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M8 321

Document contains same order item more than once

An inbound invoice is rejected because the same purchase-order item is supplied more than once in a way the posting logic cannot accept.

Likely root causes

  1. The source invoice contains duplicate references to the same PO item.
  2. Interface mapping creates duplicate item segments.
  3. Item aggregation/splitting logic generates the same PO/item key more than once incorrectly.

What to inspect

  1. Inbound IDoc item segments and PO/item references.
  2. Source invoice lines before mapping.
  3. Middleware mapping or transformation rules that group or split invoice lines.

Resolution path

  1. Determine whether the duplicate is legitimate business detail or an interface duplication.
  2. If duplicate, correct the source or mapping.
  3. If multiple commercial lines must reference one PO item, use the supported invoice structure for that process.
  4. Retest and reconcile invoice totals before reprocessing.

ERPClimb is an independent platform and is not affiliated with SAP SE.