When multiple solution import/publish all requests are run at the same time an error occurs as per the following.

https://learn.microsoft.com/en-us/troubleshoot/power-platform/power-apps/solutions/cannot-import-solutions-publish-changes#workaround

The page above suggests using Azure pipelines or Github Actions to serialize the deployment actions but it would be beneficial if Dataverse had an internal queing mechanism to avoid this issue.