TAAS

Description
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1. Created a stock for a ticket/voucher.
2. Issued or sold that stock to Party A
3. Then Party A cancelled and refunded this voucher/ticket.
4. Now agency can't resell this stocked voucher/ticket to Party B.

IN VOUCHER STOCK MODULE
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--> Add Checkbox left side, bottom
--> Label "Release the Voucher for New Sale If Refunded" 

--Blue * and Need Detailed Title -> "Release at the time of refund. only release if not expired" 

=> Related Module Work (Refund)
--> At the time Refund if any item having Stock and ticked "Release the Voucher for New Sale If Refunded" and not expired then release voucher no. by incrementing "tbl_supp_do_no.sin_avoid_duplicate_flag" 

New Solution:
1. Stock Item on Invoice/Issue Delete then do hard delete in tbl_supp_doc_no table
2. Stock Item on Refund Delete then change status to Previous Status
3. Voucher Stock/Package stock release ticked then that item's voucher_stock/package_stock table incriment  "tbl_supp_do_no.sin_avoid_duplicate_flag" on refund/cancel time.