Hello Amazing Jira Community,
We have a lot of Custom Issue types and we wanted to reduce the number by clubbing them into generic issue types.
The problem here that i had before a list of custom fields related to each issue type which is different from the other fields of the other issue type, let me share an example below:
Custom Issue type 1: Flight Booking
Custom Fields: Traveller Name, Flight time, From, To
Custom Issue type 2: Hotel Booking
Custom Fields: Hotel Name, Number of nights, Breakfast Included
If want to create a generic custom issue type called "Logistics", then add a drop down list called "Request type" and in that dropdown two options (Flight Booking, and Hotel Booking)
The question is, if i selected Flight booking would i be able to see only the custom fields related to this request type (E.g. Traveller Name, Flight time, From, To) and when i select from the dropdown list the Hotel Booking then i will see only the custom fields related to this request (E.g. Hotel Name, Number of nights, Breakfast Included) ?
If this is doable then this will save our life, otherwise i might end up creating more than 70 issue types with its related custom fields 
Please help!