diff --git a/lib/lib-dynamodb/src/commands/utils.ts b/lib/lib-dynamodb/src/commands/utils.ts
index 9f5eea91d60d..51aa78546496 100644
--- a/lib/lib-dynamodb/src/commands/utils.ts
+++ b/lib/lib-dynamodb/src/commands/utils.ts
@@ -62,7 +62,7 @@ const processObj = (obj: any, processFunc: Function, keyNodes?: KeyNodes): any =
 const processKeysInObj = (obj: any, processFunc: Function, keyNodes: KeyNodeChildren) => {
   let accumulator: any;
   if (Array.isArray(obj)) {
-    accumulator = [...obj];
+    accumulator = obj.filter((item) => typeof item !== "function");
   } else {
     accumulator = {};
     for (const [k, v] of Object.entries(obj)) {