The Validation Rule doesn’t seem to be working. The Requirement is after the Opportunity Stage is changed to ‘Final Bid Submitted’, the user should be able to only change ‘Opportunity Stage’ field and no other field. Right now, I am being shown the error even if I don’t change anything and click ‘Save’ where Opportunity Stage is ‘Final Bid Submitted’. Please check.
IF(
(NOT(ISNEW()) && RecordType.Name == 'BAC Overview' && ISPICKVAL(StageName, 'Final Bid Submitted')),
IF(ISCHANGED(StageName),
FALSE,
TRUE
),
FALSE
)