Undefined array key "foreign_match_fields"

[bh-teufels]

TYPO3 12.4.10
PHP 8.3.2 (appears on 8.2 also)
mask 8.3.8

Error Log:

Core: Exception handler (WEB): Uncaught TYPO3 Exception: MASK\Mask\Definition\TableDefinitionCollection::loadField(): Argument #2 ($fieldName) must be of type string, null given, called in [...]/vendor/mask/mask/Classes/ItemsProcFuncs/CTypeList.php on line 56 | TypeError thrown in file [...]/vendor/mask/mask/Classes/Definition/TableDefinitionCollection.php in line 193.

Core: Error handler (BE): PHP Warning: Trying to access array offset on null in [...]/vendor/mask/mask/Classes/ItemsProcFuncs/CTypeList.php line 47

Core: Error handler (BE): PHP Warning: Undefined array key "foreign_match_fields" in [...]/vendor/mask/mask/Classes/ItemsProcFuncs/CTypeList.php line 47

[nhovratov]

@bh-teufels Looks like you use field type "Content". Could you show me your json file(s)? One more question: Did you upgrade from an older version or did this happen on a new installation?

[bh-teufels]

yes uses field type "content".
updated from TYPO3 11 to TYPO3 12

I don't had any CE in Maks. I had already exported these to own Extensions using maks_export. But keep the mask Extension. To resolve the Problem i uninstalled maks. so i cant provide the json.

[nhovratov]

Ah ok, so probably you have some Content Elements with colPos "999" left. But as you do not use the Mask Json anymore, this leads to the undefined array key warning.

[bh-teufels]

okay so nothing which you can intercept with isset or something to provide running into this error?
then this can be closed because in this case I no longer use mask

Thank you

[nhovratov]

I think this can be fixed, but is really an edge-case. So keep this ticket open.