diff -u b/replication.install b/replication.install
--- b/replication.install
+++ b/replication.install
@@ -4,8 +4,8 @@
 use Drupal\Core\Database\Database;
 
 /**
- * Create revisionable fields in the revision table for replication_log
- * entity type if they are missing.
+ * Create revisionable fields in the revision table for replication_log entity
+ * type if they are missing.
  */
 function replication_update_8100() {
   $connection = Database::getConnection();
@@ -29,8 +29,6 @@
       $table_base = ($entity_type->isTranslatable()) ? $entity_type->getDataTable() : $entity_type->getBaseTable();
       $table_revision = ($entity_type->isTranslatable()) ? $entity_type->getRevisionDataTable() : $entity_type->getRevisionTable();
 
-      // Block content definition doesn't include the revision field table.
-      // So get it.
       /** @var \Drupal\Core\Entity\Sql\TableMappingInterface $table_mapping */
       $table_mapping = $storage->getTableMapping();
       $tables = $table_mapping->getTableNames();
@@ -42,7 +40,7 @@
         $table_revision = $entity_type_id . '_revision';
       }
 
-      if ($schema->tableExists($table_base) && $table_revision) {
+      if ($schema->tableExists($table_base) && $table_revision && $schema->tableExists($table_revision)) {
         // Get data from base table.
         $table_base_results = $connection->select($table_base)
           ->fields($table_base)