Solution : https://service.sap.com/sap/support/notes/1260496 (SAP Service marketplace login required)
Key words :
source code corrections, maintain product groups, locking conflict occurs, product group, locking problems, transaction mc84, change members, master data, occur occasionally, update program
Related Notes :
| 1390605 | MC86: Update termination when you save |
| 1082864 | Creating a product group and lock in material master |