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POS Closing Voucher alreday exists and not pos closing in database erpnext

i had an issue when i try to close the pos closing fousher gives me thes error
POS Closing Voucher alreday exists for ahmed.kamel.com between date 2021-02-13 00:00:00 and 2021-02-13 00:00:00
but when i open the database and try to find these closing voucher there is nothing
in the data base although all the invoices i have made in these day is already exist in the database

can someone help me to solve it above issue?