diff --git a/base/container_files/conf/grouper.properties b/base/container_files/conf/grouper.properties
index ae9c4e0..411f5c4 100644
--- a/base/container_files/conf/grouper.properties
+++ b/base/container_files/conf/grouper.properties
@@ -68,3 +68,13 @@ grouper.membership.customComposite.compositeType.0 = complement
 # {valueType: "group", regex: "^grouper\\.membership\\.customComposite\\.groupName\\.\\d+$"}
 grouper.membership.customComposite.groupName.0 = ref:iam:active
 
+
+# Override default property added to 2.5.49
+group.validateExtensionByDefault = false
+stem.validateExtensionByDefault = false
+attributeDef.validateExtensionByDefault = false
+attributeDefName.validateExtensionByDefault = false
+grouperHook.StemUniqueNameCaseInsensitiveHook.autoRegister = false
+grouperHook.GroupUniqueNameCaseInsensitiveHook.autoRegister = false
+grouperHook.AttributeDefUniqueNameCaseInsensitiveHook.autoRegister = false
+grouperHook.AttributeDefNameUniqueNameCaseInsensitiveHook.autoRegister = false