Error map
VersionError: No matching document found for id Mongoose: VersionError: No matching document found for id "5f..." version 3 modifiedPaths "items"
MongoDB · layer 5, Data
Centre: this error. First ring: errors it is linked with (10). Outer ring: what those are linked with. Colours show the layer of a request each error belongs to. Click any dot to re-centre the map on it; hover to follow its connections. The centre dot opens the error page.
Directly related (10)
Operation cannot be fulfilled on deployments.apps "x": the object has been modified; please apply your changes to the latest version and try again
Optimistic-concurrency conflict: the object changed (new resourceVersion) between when you read it and when you tried to update i…
ValidationError: User validation failed: email: Path `email` is required.
A document failed Mongoose schema validation before saving.
ConditionalCheckFailedException: The conditional request failed
A write’s ConditionExpression evaluated to false, so DynamoDB didn’t perform it — often exactly as designed.
MongooseError: Model.find() no longer accepts a callback
Mongoose 7+ removed callback support from queries; they return promises.
Mongoose: OverwriteModelError: Cannot overwrite `User` model once compiled.
`mongoose.model('User', schema)` was called twice with the same name, typically from hot reloading.
Mongoose: MissingSchemaError: Schema hasn't been registered for model "User". Use mongoose.model(name, schema)
You used `populate()`/`ref` for a model that hasn't been registered yet.
MongoServerError: WriteConflict error: this operation conflicted with another operation. Please retry your operation or multi-document transaction
Two operations tried to modify the same document at once; one was aborted with a transient error.
MongoParseError: option usenewurlparser is not supported
Old connection options removed in Mongoose 6 / driver 4 are still passed to `mongoose.connect`.
Mongoose: CastError: Cast to date failed for value "abc" (type string) at path "createdAt"
A value couldn't be converted to the schema type at that path (date, number, boolean).
Rails: ActiveRecord::StaleObjectError: Attempted to update a stale object: Order
Two users/processes updated the same record; the second save failed the `lock_version` check.
Two steps away (25)
HTTP 409 Conflict
The request conflicts with the current state of the resource — e.g. a duplicate or an edit based on an outdated version.
java.util.ConcurrentModificationException
A collection was modified while being iterated (even in a single thread).
HTTP 412 Precondition Failed
A conditional request header (If-Match, If-Unmodified-Since) didn’t match the current state of the resource.
HTTP 422 Unprocessable Content
The request is well-formed, but the data fails validation (e.g. invalid email, missing required field).
java.lang.IllegalArgumentException
A method rejected an argument value as invalid.
Express: req.body is undefined / {} (body parser missing)
Express didn’t parse the request body because no body-parsing middleware matched the request’s Content-Type.
java.lang.InterruptedException (sleep interrupted)
A blocked thread (sleep, wait, join, queue take) was interrupted by another thread.
java.util.concurrent.TimeoutException
A Future.get(timeout) or async operation didn’t complete in the allowed time.
ERROR: could not serialize access due to concurrent update
A REPEATABLE READ/SERIALIZABLE transaction conflicted with a concurrent one and must be retried.
Mongoose 6+: StrictPopulateError: Cannot populate path `author` because it is not in your schema
`populate('author')` references a field that isn't defined in the schema with a `ref`.
Mongoose: [MONGOOSE] DeprecationWarning: Mongoose: the strictQuery option will be switched back to false by default in Mongoose 7
A deprecation warning about how unknown fields in query filters are handled.
CastError: Cast to ObjectId failed for value "x" (type string) at path "_id"
A value that isn’t a valid 24-hex-character ObjectId was used in an _id query.
MongoServerError: ns not found (NamespaceNotFound) — dropping/renaming/collStats on a missing collection
A command referenced a collection (namespace) that doesn't exist.
MongooseError: The `uri` parameter to `openUri()` must be a string, got "undefined". Make sure the first parameter to `mongoose.connect()` is a string
`mongoose.connect()` received `undefined` instead of a connection string — the environment variable wasn't loaded.
MongoServerError: E11000 duplicate key error collection: db.users index: email_1 dup key
An insert/update violated a unique index in MongoDB.
MongoServerError: bad auth : Authentication failed. (Atlas user / special characters in password)
Atlas rejected the username/password in the connection string.
MongoServerError: Transaction numbers are only allowed on a replica set member or mongos
You started a transaction (or used retryWrites) on a standalone MongoDB server, which doesn't support them.
MongooseError: Operation `users.find()` buffering timed out after 10000ms
Mongoose queued a query waiting for a connection that never opened.
MongoDB: MongoParseError: Invalid scheme, expected connection string to start with "mongodb://" or "mongodb+srv://"
The connection string is missing, malformed, or the environment variable holding it is undefined.
pydantic_core._pydantic_core.ValidationError: 1 validation error for Model
Data didn’t match a Pydantic model — a field is missing, has the wrong type, or fails a constraint.
DynamoDB ValidationException: One or more parameter values were invalid: Missing the key pk in the item / The provided key element does not match the schema
The item or key doesn’t match the table’s primary key schema — wrong attribute name, wrong type, or missing sort key.
strict decoding error: unknown field "spec.template.spec.containers[0].ports[0].protocl"
The manifest contains a field the API schema doesn’t know — a typo, wrong indentation, or a field from another API version.
MySQL ERROR 1213 (40001): Deadlock found when trying to get lock; try restarting transaction
MySQL detected a deadlock between two transactions and rolled one back.
Rails: ActiveRecord::RecordNotUnique: PG::UniqueViolation: ERROR: duplicate key value violates unique constraint "index_users_on_email"
A unique index rejected an insert/update because the value already exists.
Rails: ActiveRecord::ConnectionNotEstablished: No connection pool for 'ActiveRecord::Base' found
ActiveRecord has no database connection configured or established for this process.
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