diff --git a/backend/src/routes/resources/main.ts b/backend/src/routes/resources/main.ts
index b7a5a7b..547cb64 100644
--- a/backend/src/routes/resources/main.ts
+++ b/backend/src/routes/resources/main.ts
@@ -230,6 +230,27 @@ function isDateLikeField(key: string) {
     return /(^|_|-)date($|_|-)/i.test(key)
 }
 
+function normalizeCreatedDocumentPayload(payload: Record<string, any>) {
+    const serialexecution = payload.serialexecution
+    if (serialexecution === undefined || serialexecution === null || serialexecution === "") return payload
+
+    if (serialexecution instanceof Date) {
+        payload.serialexecution = null
+        return payload
+    }
+
+    if (typeof serialexecution === "string") {
+        const normalized = serialexecution.trim()
+        const isUuid = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i.test(normalized)
+        if (!isUuid && !Number.isNaN(new Date(normalized).getTime())) {
+            payload.serialexecution = null
+            return payload
+        }
+    }
+
+    return payload
+}
+
 function normalizeMemberPayload(payload: Record<string, any>) {
     const infoData = payload.infoData && typeof payload.infoData === "object" ? payload.infoData : {}
     const normalized = {
@@ -877,6 +898,10 @@ export default async function resourceRoutes(server: FastifyInstance) {
                 }
             }
 
+            if (resource === "createddocuments") {
+                createData = normalizeCreatedDocumentPayload(createData)
+            }
+
             if (config.numberRangeHolder && !body[config.numberRangeHolder]) {
                 const numberRangeResource = resource === "members" ? "customers" : resource
                 const result = await useNextNumberRangeNumber(server, req.user.tenant_id, numberRangeResource)
@@ -1024,6 +1049,10 @@ export default async function resourceRoutes(server: FastifyInstance) {
                 }
             }
 
+            if (resource === "createddocuments") {
+                data = normalizeCreatedDocumentPayload(data)
+            }
+
             Object.keys(data).forEach((key) => {
                 const value = data[key]
                 const shouldNormalize =