When attempting to import a solution in Dynamics 365, you encounter the following error:
"The import of solution: [solution name] failed.
Error code 8004f016"
Within the Detail column of the grid, you see the following message:
"A managed solution cannot overwrite a [component type] component on the target system that has an unmanaged base instance. The most likely scenario for this error is that an unmanaged solution has installed a new unmanaged [component type] component on the target system, and now a managed solution from the same publisher is trying to install that same [component type] component as managed. This will cause an invalid layering of solutions on the target system and is not allowed."