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Unable to Edit Item Class Segmented Key – Is There Any Supported Way? the length from 10-2 on item class segmented keys

  • January 15, 2026
  • 0 replies
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I’m trying to update the Item Class segmented key (Edit Mask) in Acumatica, but I’m getting the following error:

“CS Error: Edit Mask cannot be changed. There are Item Class identifier AUTO to which the new edit mask cannot be applied.”

Item Classes already exist and use the AUTO identifier.

I understand that Acumatica restricts changes once the segmented key is in use, but I wanted to confirm with the community:

  • Is there any supported way to modify the existing Item Class segmented key?

  • Or is creating a new segmented key the only recommended approach?

Looking for best practices or real-world experiences before proceeding.

Thank you in advance for your guidance