Unhandled exception occur when trying to update document

[KhaledMosaad]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the bug has not already been reported

Mongoose version

8.18.2

Node.js version

22.12

MongoDB server version

8.0

Typescript version (if applicable)

No response

Description

I have an issue when try to update a document with reach embedded documents, the stack trace of the error is:

TypeError: Cannot read properties of undefined (reading 'split')
    at Schema.hasMixedParent (/app/node_modules/mongoose/lib/schema.js:1934:25)
    at Schema.path (/app/node_modules/mongoose/lib/schema.js:1233:23)
    at Schema._getSchema (/app/node_modules/mongoose/lib/schema.js:2876:28)
    at walkUpdatePath (/app/node_modules/mongoose/lib/helpers/query/castUpdate.js:384:27)
    at castUpdate (/app/node_modules/mongoose/lib/helpers/query/castUpdate.js:144:7)
    at model.Query._castUpdate (/app/node_modules/mongoose/lib/query.js:4874:10)
    at model.Query._updateThunk (/app/node_modules/mongoose/lib/query.js:4062:25)
    at model.Query._updateOne (/app/node_modules/mongoose/lib/query.js:4150:23)
    at model.Query.exec (/app/node_modules/mongoose/lib/query.js:4627:80)
    at processTicksAndRejections (node:internal/process/task_queues:105:5)
    at Object.updateSettings (file:///app/src/modules/assessments/assessments/services/assessments.js:843:9)
    at updateSettings (file:///app/src/modules/assessments/assessments/controller/index.js:73:7)

Steps to Reproduce

I can't reproduce it systematically

Expected Behavior

No response