There are five procedures for this phenomenon.

(1) To be performed by two or more users

(2) Enter 5 or more items in the order line and set Reserved Quantity of all lines to 0.

(3) Execute Actions > Functions > Create Purchase Document > Create Purchase Orders to open the Create Purchase Order dialog box.

(4) Set the supplier of the line in the Create Purchase Order dialog to the same supplier for all users who will perform the verification.

(5) If the OK button in the Create Purchase Order dialog is pressed simultaneously by the user performing the verification, a deadlock will occur at a high frequency.

The user who confirmed this phenomenon often places an Purchase Order for a line that was entered in the Sales Order, and often changes the supplier each time, taking the inventory situation into account when placing the order. 

In addition, about 20 users are simultaneously performing input work, and the high frequency of deadlocks is causing operational stress.