String snapping

Hello… I’m wondering if I’m doing anything wrong that’s causing my strings to snap when retuning. I’m learning a song right now outside of standard tuning so I’m pretty frequently changing between that and standard tuning. Yesterday I snapped a string while going back to standard and I’m wondering if I’m doing something wrong when stringing it originally. Are banjos just not meant to go back and forth in tuning that much? Sincerely, a beginner