Hello community

I'm struggling with a small error which I can't seem to find an answer to. Can you help?

[{"message":"bad value for restricted picklist field: Bristol","errorCode":"INVALID_OR_NULL_FOR_RESTRICTED_PICKLIST","fields":["RM_Region__c"]}]

There are scores of picklist values within "RM_Region__c". For some reason, "Bristol" is being rejected.

The closest I can get to a possible answer is that "Bristol" needs to be allocated somewhere for it to work?

I'd really appreciate any ideas the community have.

Many thanks and look forward to hearing from you.