diff --git a/forward_engineering/alterScript/alterScriptHelpers/entityHelpers/primaryKeyHelper.js b/forward_engineering/alterScript/alterScriptHelpers/entityHelpers/primaryKeyHelper.js
index fd80e15..442ca19 100644
--- a/forward_engineering/alterScript/alterScriptHelpers/entityHelpers/primaryKeyHelper.js
+++ b/forward_engineering/alterScript/alterScriptHelpers/entityHelpers/primaryKeyHelper.js
@@ -148,7 +148,7 @@ const wasCompositePkChangedInTransitionFromCompositeToRegular = collection => {
 		return PkTransitionDto.noTransition();
 	}
 	const idOfPkColumn = idsOfColumns[0];
-	const newColumnJsonSchema = Object.values(collection.role.properties).find(
+	const newColumnJsonSchema = Object.values(collection.properties || {}).find(
 		columnJsonSchema => columnJsonSchema.GUID === idOfPkColumn,
 	);
 	if (!newColumnJsonSchema) {
diff --git a/forward_engineering/alterScript/alterScriptHelpers/entityHelpers/uniqueKeyHelper.js b/forward_engineering/alterScript/alterScriptHelpers/entityHelpers/uniqueKeyHelper.js
index bf48e9b..0bd5246 100644
--- a/forward_engineering/alterScript/alterScriptHelpers/entityHelpers/uniqueKeyHelper.js
+++ b/forward_engineering/alterScript/alterScriptHelpers/entityHelpers/uniqueKeyHelper.js
@@ -86,7 +86,7 @@ const wasCompositeUniqueKeyChangedInTransitionFromCompositeToRegular = collectio
 		return UniqueKeyTransitionDto.noTransition();
 	}
 	const idOfUniqueKeyColumn = idsOfColumns[0];
-	const newColumnJsonSchema = Object.values(collection.role.properties).find(
+	const newColumnJsonSchema = Object.values(collection.properties || {}).find(
 		columnJsonSchema => columnJsonSchema.GUID === idOfUniqueKeyColumn,
 	);
 	if (!newColumnJsonSchema) {