Once the resource is saved, its type cannot be changed. This is because 'Resource Type' is the core grouping and administrator can design different forms for different resource types. Thus, technically it is possible that the resource type you want to change to does not have the fields required to capture information already captured in the current form.
Example: Administrator has defined two resource types...
Form for resource type 'Employee' has the following fields...
Whereas the form for type 'Contractor' has the following fields...
In this scenario, if we try to change the type of resource 'John Smith' form 'Employee' to 'Contractor', then it's not technically possible, as the form for 'Contractor' cannot accommodate John's skills and qualifications. Thus the system does not allow changing John from Employee to Contractor.
If you have mistakenly added a resource as a wrong type, then we recommend one of the following two options...
1. Delete the resource and add again as correct type. The only limitation is that all existing bookings and related data will also be deleted, so it's only recommended if its a new resource with no bookings or if you do not mind deleting existing bookings of the resource.
2. If option one is not convenient, then archive the resource and add again as the correct type. Archiving preserves all data, including bookings.
Note: We do not recommend creating different resource types unless you want to capture different information using different fields in forms of each resource type.
If you want to capture the same information (skills, certificates etc.) for your resource types and only want 'Type' as a differentiator, then use a custom field ('Drop Down Single Select') and use values like 'Employee', 'Contractor', 'Apprentice' etc OR you can use tags in the resource form.