method.optional_marker_invalid

An optional marker is misplaced


Type	`https://mthds.ai/errors/method.optional_marker_invalid`
Family	`method`: The method as written, the validation vocabulary included.
Domain	`method`: the method's author acts, by changing the method
Retry	`no`: repeating the operation fails the same way
HTTP status	`422`
Raised as	a problem document, sent as the body of an HTTP response or kept in a run's record

What it means

A presence marker sits where the language does not allow one, such as a ? on a plural reference or a ! on an output.

What to do

Read where ? and ! may appear, and move or remove the marker.

Next steps

A problem carries the step aimed at whoever reads it: the first when its reader is the domain's actor, the method's author, and the second for any other reader.

Reader	Kind	Detail
The domain's actor	`change_method`	Remove or move the marker at '`{field_path}`', then validate the method again.
Any other reader	`contact_owner`	Ask the method's owner to fix the presence marker at '`{field_path}`'.

Detail

The problem's detail is written from this template, filled with the occurrence's parameters:

Pipe '{pipe}' carries a presence marker at '{field_path}', where the language does not allow one.

Parameters

Every parameter is present on every occurrence of the code.

Name	Type	Description
`pipe`	`identifier`	The pipe at fault.
`field_path`	`identifier`	Where the marker sits, as a key path.