diff --git a/config/schema/search_api.datasource.schema.yml b/config/schema/search_api.datasource.schema.yml
index e1d196e..c607af8 100644
--- a/config/schema/search_api.datasource.schema.yml
+++ b/config/schema/search_api.datasource.schema.yml
@@ -9,5 +9,5 @@
       type: sequence
       label: 'The selected bundles'
       sequence:
-        - type: string
-          label: 'An entity bundle'
+        type: string
+        label: 'An entity bundle'
diff --git a/config/schema/search_api.index.schema.yml b/config/schema/search_api.index.schema.yml
index eab6700..9f8ad3c 100644
--- a/config/schema/search_api.index.schema.yml
+++ b/config/schema/search_api.index.schema.yml
@@ -25,15 +25,15 @@ search_api.index.*:
           type: sequence
           label: 'Indexed fields'
           sequence:
-            - type: mapping
-              label: field
-              mapping:
-                type:
-                  type: string
-                  label: 'Type of field'
-                boost:
-                  type: integer
-                  label: 'Boost'
+            type: mapping
+            label: field
+            mapping:
+              type:
+                type: string
+                label: 'Type of field'
+              boost:
+                type: integer
+                label: 'Boost'
         additional fields:
           type: sequence
           label: 'Included additional fields'
@@ -47,31 +47,31 @@ search_api.index.*:
           type: sequence
           label: 'Processor settings'
           sequence:
-            - type: mapping
-              label: 'A processor'
-              mapping:
-                status:
-                  type: string
-                  label: 'Status of the processor'
-                weight:
-                  type: integer
-                  label: 'The weight of the processor'
-                processorPluginId:
-                  type: string
-                  label: 'The plugin ID of the processor'
-                settings:
-                  type: search_api.processor.plugin.[%parent.processorPluginId]
+            type: mapping
+            label: 'A processor'
+            mapping:
+              status:
+                type: string
+                label: 'Status of the processor'
+              weight:
+                type: integer
+                label: 'The weight of the processor'
+              processorPluginId:
+                type: string
+                label: 'The plugin ID of the processor'
+              settings:
+                type: search_api.processor.plugin.[%parent.processorPluginId]
     datasources:
       type: sequence
       label: 'Datasource plugin IDs'
       sequence:
-        - type: string
+        type: string
     datasource_configs:
       type: sequence
       label: 'Datasource plugin configurations'
       sequence:
-        - type: search_api.datasource.plugin.[%key]
-          label: 'Datasource plugin configuration'
+        type: search_api.datasource.plugin.[%key]
+        label: 'Datasource plugin configuration'
     tracker:
       type: string
       label: 'Tracker plugin ID'
diff --git a/config/schema/search_api.processor.schema.yml b/config/schema/search_api.processor.schema.yml
index fc29484..f0fb9a1 100644
--- a/config/schema/search_api.processor.schema.yml
+++ b/config/schema/search_api.processor.schema.yml
@@ -6,8 +6,8 @@ search_api.processor.plugin.add_url:
       type: sequence
       label: 'The selected fields'
       sequence:
-        - type: string
-          label: 'Selected field'
+        type: string
+        label: 'Selected field'
 
 search_api.processor.plugin.aggregated_field:
   type: mapping
@@ -17,27 +17,27 @@ search_api.processor.plugin.aggregated_field:
       type: sequence
       label: 'Action to take for aggregated fields'
       sequence:
-        - type: string
-          label: 'Could be to multiply or join or any other supported operation'
+        type: string
+        label: 'Could be to multiply or join or any other supported operation'
     fields:
       type: sequence
       label: 'The aggregated fields configured for this index'
       sequence:
-        - type: mapping
-          label: 'One field'
-          mapping:
-            fields:
-              type: sequence
-              label: 'The selected fields to be aggregated'
-              sequence:
-                - type: string
-                  label: 'One field that should be part of the aggregation'
-            label:
+        type: mapping
+        label: 'One field'
+        mapping:
+          fields:
+            type: sequence
+            label: 'The selected fields to be aggregated'
+            sequence:
               type: string
-              label: 'Label'
-            type:
-              type: string
-              label: 'Type'
+              label: 'One field that should be part of the aggregation'
+          label:
+            type: string
+            label: 'Label'
+          type:
+            type: string
+            label: 'Type'
 
 search_api.processor.plugin.highlight:
   type: mapping
@@ -67,8 +67,8 @@ search_api.processor.plugin.html_filter:
       type: sequence
       label: 'The selected fields'
       sequence:
-        - type: string
-          label: 'The field name'
+        type: string
+        label: 'The field name'
     title:
       type: boolean
       label: 'Title'
@@ -79,8 +79,8 @@ search_api.processor.plugin.html_filter:
       type: sequence
       label: 'Tag boosts'
       sequence:
-        - type: integer
-          label: Boost
+        type: integer
+        label: Boost
 
 search_api.processor.plugin.ignorecase:
   type: mapping
@@ -90,8 +90,8 @@ search_api.processor.plugin.ignorecase:
       type: sequence
       label: 'The selected fields'
       sequence:
-        - type: string
-          label: 'Selected field'
+        type: string
+        label: 'Selected field'
 
 search_api.processor.plugin.ignore_character:
   type: mapping
@@ -101,8 +101,8 @@ search_api.processor.plugin.ignore_character:
       type: sequence
       label: 'The selected fields'
       sequence:
-        - type: string
-          label: 'Selected field'
+        type: string
+        label: 'Selected field'
     ignorable:
       type: string
       label: 'Regular expression for characters it should ignore to stem'
@@ -114,8 +114,8 @@ search_api.processor.plugin.ignore_character:
           type: sequence
           label: 'Configuration of the character sets'
           sequence:
-            - type: ignore
-              label: 'Character set'
+            type: ignore
+            label: 'Character set'
 
 search_api.processor.plugin.language:
   type: mapping
@@ -125,8 +125,8 @@ search_api.processor.plugin.language:
       type: sequence
       label: 'The selected fields'
       sequence:
-        - type: string
-          label: 'Selected field'
+        type: string
+        label: 'Selected field'
 
 search_api.processor.plugin.node_status:
   type: mapping
@@ -136,8 +136,8 @@ search_api.processor.plugin.node_status:
       type: sequence
       label: 'The selected fields'
       sequence:
-        - type: string
-          label: 'Selected field'
+        type: string
+        label: 'Selected field'
 
 search_api.processor.plugin.rendered_item:
   type: mapping
@@ -148,14 +148,14 @@ search_api.processor.plugin.rendered_item:
       type: sequence
       label: 'The selected view modes'
       sequence:
-        - type: string
-          label: 'The view mode used to render the entity'
+        type: string
+        label: 'The view mode used to render the entity'
     roles:
       type: sequence
       label: 'The selected roles'
       sequence:
-        - type: string
-          label: 'The user roles which will be active when the entity is rendered'
+        type: string
+        label: 'The user roles which will be active when the entity is rendered'
 
 search_api.processor.plugin.role_filter:
   type: mapping
@@ -168,8 +168,8 @@ search_api.processor.plugin.role_filter:
       type: sequence
       label: 'The selected roles'
       sequence:
-        - type: string
-          label: 'The role name'
+        type: string
+        label: 'The role name'
 
 search_api.processor.plugin.stopwords:
   type: mapping
@@ -179,14 +179,14 @@ search_api.processor.plugin.stopwords:
       type: sequence
       label: 'The selected fields'
       sequence:
-        - type: string
-          label: 'Selected field'
+        type: string
+        label: 'Selected field'
     stopwords:
       type: sequence
       label: 'entered stopwords'
       sequence:
-        - type: string
-          label: Stopword
+        type: string
+        label: Stopword
 
 search_api.processor.plugin.tokenizer:
   type: mapping
@@ -196,8 +196,8 @@ search_api.processor.plugin.tokenizer:
       type: sequence
       label: 'The selected fields'
       sequence:
-        - type: string
-          label: 'Selected field'
+        type: string
+        label: 'Selected field'
     spaces:
       type: string
       label: 'Regular expression for spaces'
@@ -219,8 +219,8 @@ search_api.processor.plugin.transliteration:
       type: sequence
       label: 'The selected fields'
       sequence:
-        - type: string
-          label: 'Selected field'
+        type: string
+        label: 'Selected field'
 
 search_api.processor.plugin.content_access:
   type: mapping
@@ -230,5 +230,5 @@ search_api.processor.plugin.content_access:
       type: sequence
       label: 'The selected fields'
       sequence:
-        - type: string
-          label: 'Selected field'
+        type: string
+        label: 'Selected field'
diff --git a/config/schema/search_api.tracker.schema.yml b/config/schema/search_api.tracker.schema.yml
index 75c3dca..7f2cca9 100644
--- a/config/schema/search_api.tracker.schema.yml
+++ b/config/schema/search_api.tracker.schema.yml
@@ -3,5 +3,5 @@ search_api.tracker.plugin.default:
   type: sequence
   label: 'Entity tracker configuration'
   sequence:
-    - type: string
-      label: 'An entity bundle'
+    type: string
+    label: 'An entity bundle'
diff --git a/config/schema/search_api.views.schema.yml b/config/schema/search_api.views.schema.yml
index addcab3..c479a51 100644
--- a/config/schema/search_api.views.schema.yml
+++ b/config/schema/search_api.views.schema.yml
@@ -16,8 +16,8 @@ views.row.search_api:
       type: sequence
       label: View modes foreach source
       sequence:
-        - type: string
-          label: View mode
+        type: string
+        label: View mode
 
 views.filter.search_api_fulltext:
   type: views_filter
@@ -35,5 +35,5 @@ views.filter.search_api_fulltext:
       type: sequence
       label: Fields to search on
       sequence:
-        - type: string
-          label: Field name
+        type: string
+        label: Field name
diff --git a/search_api_db/config/schema/search_api_db.backend.schema.yml b/search_api_db/config/schema/search_api_db.backend.schema.yml
index 2da77b0..9b4bed8 100644
--- a/search_api_db/config/schema/search_api_db.backend.schema.yml
+++ b/search_api_db/config/schema/search_api_db.backend.schema.yml
@@ -22,27 +22,27 @@ search_api.backend.plugin.search_api_db:
       type: sequence
       label: 'Field tables'
       sequence:
-        - type: sequence
-          label: 'Field table'
-          sequence:
-            - type: mapping
-              label: 'Field'
-              mapping:
-                table:
-                  type: 'string'
-                  label: 'The name of the table in the database'
-                column:
-                  type: 'string'
-                  label: 'The column of the field'
-                type:
-                  type: 'string'
-                  label: 'The type of the field'
-                boost:
-                  type: 'float'
-                  label: 'The boost level for the field'
+        type: sequence
+        label: 'Field table'
+        sequence:
+          type: mapping
+          label: 'Field'
+          mapping:
+            table:
+              type: 'string'
+              label: 'The name of the table in the database'
+            column:
+              type: 'string'
+              label: 'The column of the field'
+            type:
+              type: 'string'
+              label: 'The type of the field'
+            boost:
+              type: 'float'
+              label: 'The boost level for the field'
     index_tables:
       type: sequence
       label: 'Index tables'
       sequence:
-        - type: 'string'
-          label: 'Index table'
+        type: 'string'
+        label: 'Index table'