Validation blocking registering a patient

When trying to register a patient on devtest02 i receive a validation error:

It actually blocks from registering a patient, because “Select a preferred identifier” validation message doesn’t seem to make sense in here and doesn’t give any information on how to pass validation

I had the same problem. Solution: If you are using the default OpenMRS ID Patient identifier - OpenMRS ID then it needs to have the Identifier validator set to one of the check digit algorithms like the Luhn Mod-30 Check-Digit Validator

NB: Also the Is Required Field need to be checked for atmost only one of the Patient Identifiers otherwise, you’ll get the error “Validation errors found: Invalid Identifier”. For instance, I checked Is Required for OpenMRS ID and OpenMRS Identification Number and got the error:

thank you this surely helped