I have a question related to an issue with SO Line Details Allocated flag. After the receipt is released for an SO line linked to PO, the Allocated flag is automatically set in the SO Line Details but unchecking and checking the Allocate flag again result in error, though the Allow Negative Quantity flag is set on the Item Class of the SO line Item and the “Ship in Full if Negative Quantity Is Allowed” flag is set on the Order Type:

Have anyone faced this issue? I would like to note that the issue happens only if the Item Available Qty is negative.