We have a client who went into their sandbox and added "new" fields, then added it to their unmanaged solution, then overwrote their managed solution on their production system. Understanding finding a record GUID but is there a way to found out the GUID of an option set on a production system?
Error:
A managed solution cannot overwrite the OptionSet component with Id=;dfdlkfjldskjflsdkjflksdjfldjslfj which has an unmanaged base instance. The most likely scenario for this error is that an unmanaged solution has installed a new unmanaged OptionSet component on the target system, and now a managed solution from the same publisher is trying to install that same OptionSet component as managed. This will cause an invalid layering of solutions on the target system and is not allowed.