[SAP EWM] Putaway Block is set to Storage Bin after picking

Requirement :

Upon Warehouse Task (WT) confirmation from a Source Storage Type with Bulk behavior, Putaway Block (PB) (field SKZUE) is set for the storage bin where the stock was picked from.

Root cause :

Customizing. On transaction /SPRO, following the path below you have set field 'Putaway Blocked' (field SENAU).

SCM Extended Warehouse Management
    Extended Warehouse Management
        Goods Receipt Process
            Strategies
                Putaway Rules
                    Storage Behavior: Bulk Storage
                        Storage Type Control for Bulk Storage

F1 documentation:

"Indicator: Blocked for Putaway After Stock Removal
Means that a block unit (row in bulk storage) is blocked for further putaway after the first stock removal has taken place.

Use
In this way, you can prevent a handling unit from being kept in the warehouse for an excessive number of days due to continuous stock placements. This block(age) is automatically deleted after the last handling unit has been removed from stock (picked from the row). You can also delete the block manually using a report after a specified time has elapsed."

The customizing table of this object is /SCWM/T331B and there the field 'SENAU' is checked.