Good afternoon everyone, I am facing a problem trying to create indexed attributes on my entities through sdk script. import { domainmodels } from "mendixmodelsdk"; import { MendixPlatformClient, setPlatformConfig } from "mendixplatformsdk"; const APP_ID = "f5809059-4962-4d45-ba11-bc8de7f1bbc7"; export async function executeScript(jsonData: any) { await getApp(APP_ID); async function getApp(ai: string) { setPlatformConfig({ mendixToken: "7c9iMCE3J28EBXXJmAmaAQeKEmyo4mAw9aU2PnPztTp7vDNvWxxsqdaKTZt1JJQPZmLCCqVV1S89YdrSsVgrndYoUGV8SbjguTSG", }); const client = new MendixPlatformClient(); const app = client.getApp(ai); const workingCopy = await app.createTemporaryWorkingCopy("main"); const model = await workingCopy.openModel(); const domainModelInterface = model .allDomainModels() .filter((dm) => dm.containerAsModule.name === "MyFirstModule")[0]; const domainModel = await domainModelInterface.load(); for (const entityData of jsonData) { const entityName = entityData.Name; const entity = domainmodels.Entity.createIn(domainModel); entity.name = entityName; for (const attributeData of entityData.Attributes) { const attributeName = attributeData.Attribute; if (attributeName != "Id") { const attributeType = getDataType(attributeData.Type); const attribute = domainmodels.Attribute.createIn(entity); attribute.name = attributeName; attribute.type = attributeType; if (attributeType instanceof domainmodels.StringAttributeType) { attributeType.length = attributeData.Length ? parseInt(attributeData.Length, 10) : 50; } else if (attributeType instanceof domainmodels.DecimalAttributeType) { domainmodels.StoredValue.createIn(attribute).defaultValue = attributeData.Decimals ? parseInt(attributeData.Decimals, 10).toString() : "10"; } for (const indexData of entityData.Indexes) { const indexName = indexData.Name; const index = domainmodels.Index.createIn(entity); const indexx = domainmodels.IndexedAttribute.createIn(index); indexx.attribute = indexName; } } } } function getDataType(dataType: string) { switch (dataType.toLowerCase()) { case "text": return domainmodels.StringAttributeType.create(model); case "integer": return domainmodels.IntegerAttributeType.create(model); case "long integer": return domainmodels.LongAttributeType.create(model); case "boolean": return domainmodels.BooleanAttributeType.create(model); case "datetime": return domainmodels.DateTimeAttributeType.create(model); case "binary data": return domainmodels.BinaryAttributeType.create(model); case "enumeration": return domainmodels.EnumerationAttributeType.create(model); case "decimal": return domainmodels.DecimalAttributeType.create(model); default: return domainmodels.StringAttributeType.create(model); } } await model.flushChanges(); await workingCopy.commitToRepository("main"); return workingCopy; } } I tried creating them like that (line 46-51) but i get the following error: "Cannot update property of 'DomainModels$IndexedAttribute', the given object is not yet part of a unit. Please add the object to an unit first. Hope anyone can help me, maybe provide an example of how to index an attribute on entities.