Error response during Rest Action in Skills & Qualifications

Summary:

We're experiencing a Rest Action error in Skills & Qualifications.

The issue is happening for staff that have a particular value selected in a flexfield. When viewing the error in the Developer tools, the Response states:

"status" : "400",
"o:errorDetails" : [ {
"detail" : "primaryRkeCentreAffiliation ICE - Spatial and Digital Ecologies is not in the list of values.",
"o:errorCode" : "FND:::FND_VS_VAL_NOT_IN_LIST",
"o:errorPath" : "/parts/0"

I've checked the value set and can confirm that the value is active and in date.

Has anyone else come across this? I've redeployed the flexfield but the issue still occurs.

Content (please ensure you mask any confidential information):