Internal Server error when using a number as name for form field

[robinroloff]

My client has created a new checkbox with the Name "213". After that, the form wasn't working anymore and spit out this issue:

24-09-05 08:38:59 106388 CRITICAL Exception in line 48 of /var/www/neos-marktsteft-distribution/Data/Temporary/Production/Cache/Code/Flow_Object_Classes/Sitegeist_PaperTiger_FusionObjects_SchemaCollectionImplementation.php: Neos\Error\Messages\Result::forProperty(): Argument #1 ($propertyPath) must be of type ?string, int given, called in /var/www/neos-marktsteft-distribution/Data/Temporary/Production/Cache/Code/Flow_Object_Classes/Sitegeist_PaperTiger_FusionObjects_SchemaCollectionImplementation.php on line 48 - See also: 20240905083859a978a5.txt

After changing the name and adding any other char than a number, the form was working fine again.