only in patch2:
unchanged:
--- a/key_value.info.yml
+++ b/key_value.info.yml
@@ -2,5 +2,6 @@ name: 'Key-value Extensions'
 type: module
 description: 'Extends the core key-value API with a backend for lists and sorted sets that you can do range queries on.'
 core: 8.x
+core_version_requirement: ^8 || ^9
 dependencies:
   - drupal:serialization