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Unable to copy project planning lines

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Posted on by tb513

We used to be able to copy project planning lines within a project. Today when trying to do that we are getting the following message: "Paste failed because of validation errors"

Our software was just updated to 28.0

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Dynamics 365 Business Central

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Gregory Mavrogeorgis 1,051 Super User 2026 Season 1 on at

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Hi,

Two quick things to check after the v28 upgrade:

1. Paste into a fully empty row, not over existing lines — BC 28 won't overwrite non-empty rows and the error wording is now generic.
2. v28 tightened validations on Job Planning Lines. Likely culprits: blank Type, missing Planning Date, or a default dimension now set to Mandatory.

Click *Share details* on the error popup — it names the exact field failing validation.

IF you found this helpful please mark it as verified.

Gregory Mavrogeorgis
Work: GMSOFT Limited
Blog: Inside Business Central
LinkedIn: www.linkedin.com/in/gregorymavrogeorgis

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Valentin Castravet 32,621 Super User 2026 Season 1 on at

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I tried copying project planning lines in V28 and did not encounter any errors.

As your error indicates, there may be an issue with the data you are trying to copy. I would start by checking whether there is an issue with the data on the lines you are trying to copy. Do you get this error when copying any project planning lines, or only specific ones?

Valentin Castravet
Work: Zander ERP Services
Blog: Dynamics 365 Business Central Insights
LinkedIn: www.linkedin.com/in/valentin-c-0500a247/

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tb513 66 on at

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This is the error message that we get. We are pasting in to an empty row and it is happening in different projects, so it is not isolated to this particular project

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