Is item series mandatory in adjustment issue ?

Suggestions:
System has the provision for using Inventory adjustments to manually change the Inventory registered by lot number at a specific stock point. To perform Inventory adjustments, uses must create Inventory adjustment issues.
Users have to enter required item series using pop help in the header screen. After Ref Ser is set as ‘ADJISS’ and tran type is selected as stock adjustment then users have to enter the item series for which the stock adjustment needs to be done. If users click on the next button to go to the details screen then the system will prompt to select the item series showing the message ‘Item series is blank’. Also on the bases of the same item series users are allowed to select the item in the details screen. If the user selects a different items series item then the system prompts ‘Item series is not defined in site item / item master against selected item code.’ on finishing the transaction.