Hi Jonathon
Please check entry type of your entry with MSKEYVALUE = "t_employee22". I could be that this particular entry is not MX_PERSON, but MX_GROUP or whatever else. That would be the reason when you could not modify it.
select * from idmv_entry_simple (nolock) where mcMSKEYVALUE = 't_employee22'
BR
Siarhei
