Batch processing of color throws error

When using batch to change module color to transparent an error occurs.Then after going back to Module Manager, it shows default Module Manager in stead of AMM. After logging out and in again AMM is shown again.
When batch changing color to another color it works like expected.

I think it is caused by table structure where color field is set to varchar(8 ) and batch tries to store "transparent" (11 characters). So either field length should be increased or value for transparent should be set to default value NULL.

AMM Version 10.0.23 fresh install of AMM on a site where AMM wasn't installed to make sure it wasn't caused by upgrade.
Joomla 5.1.1

Perfect. Batch processed some modules to a nice color purple and then batch processed them back to transparant. No more errors! Thx!