Dynamics 365 Error Adding Product Bundles After Upgrade to Version 9

After doing a test upgrade of an 8.2 instance to Version 9, we received an error when adding product bundles to an opportunity where the bundle had existed in 8.2. When adding a bundle from the grid it would return an error with the code - 2147206380.

And from the Opportunity Product form it would return a Plugin error with the message ‘The specified unit is not valid for this product’.

This did not affect new product bundles that we created in Version 9, even if they were identical to the existing bundles that could not be added.

We resolved this by updating the instance to version 1710 (9.0.2.1468).