[BUG]: Core Components Solution not deleted after importing the new one

[Nomester]

Describe the bug
After importing the CoE Core Components 4.15 solution I got the following message:

Solution "Center of Excellence - Core Components" failed to import: Solution Upgrade action failed after import as holding. InnerException is: {"error":{"code":"CannotDeleteApiDueToExistingConnections","message":"The custom connector admin-5foffice-20365-20management-20api-5fdad403242928fcc0 cannot be deleted because there are connections associated with this api."}}.

The solution imported fine and showed no errors, so I now have 2 Center of Excellence - Core Components solutions.

Component (please tell us which flow or app you are experiencing issues with):

• Core
• Old version 4.8, newly imported version 4.15
• Solution

To Reproduce
Steps to reproduce the behavior:

1. Import the Core Components solution and just wait

Expected behavior
Solution 4.8 to be deleted

Screenshots
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Additional context
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