3753931 - Error : "you cannot change an individual work schedule that has already been assigned as a temporary work schedule"

Below error is occured while editing an individual work schedule. 

"You cannot change an individual work schedule that has already been assigned as a temporary work schedule". 

SAP SuccessFactors Employee Central - Time Management

You cannot change an individual work schedule that has already been assigned as a temporary work schedule, temporary time information, individual work schedule, cannot change individual work schedule, administer time, TIM-57817, 1H2026, INC25233723, LOD-SF-EC-TIM-JOB , KBA , LOD-SF-EC-TIM-JOB , Time Management in Job Info - Records & Objects , LOD-SF-EC-TIM , Time Off , Problem