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18Hi Community,
I am facing an issue in Microsoft Dynamics 365 Business Central where I am unable to delete a Purchase Invoice and getting an "already exists" error. Both invoice numbers were automatically assigned by the number series — I did not manually enter any numbers.
Steps That Led to This Issue:
- BC auto-assigned PPI-004894 to a new Purchase Invoice
- I deleted that invoice before posting
- Created another Purchase Invoice — BC auto-assigned the same number PPI-004894 again
- Now I cannot delete or post this invoice
- Error message says: "PPI-004894 already exists"
What I Have Already Checked:
- The number appears in both Purchase Invoices (unposted) and Posted Purchase Invoices
- The number series seems to have reassigned a previously used number
- No payments or applications are linked to it
What I Need Help With:
- How can I safely delete this Purchase Invoice?
- Should I cancel the Posted Purchase Invoice first before deleting the unposted one?
- How do I prevent the number series from reassigning already used numbers in the future?
- Is there a risk of audit or accounting issues if I cancel the posted invoice?
Environment:
- Microsoft Dynamics 365 Business Central (Cloud/SaaS)
- Purchase Invoices Module
- Number Series — Auto Assignment
Screenshots:
- Purchase Invoice list showing PPI-004894 (unposted)
- Posted Purchase Invoice list showing PPI-004894 (posted)
Thank you in advance for any guidance!
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