1) Use Fiducial Seeding to create some fiberbundle(s).

2) Create several fiberbundles using ROISeeding

2a) Delete the fiberbundle from step 1 (through Data, don't return to FiduSdng)

3) Switch back to Fiducial Seeding. There should be a prompt:
"TrctgFidSd is about to create new tracks for 'RH_clench SEEDING' which contains polydata. Do you want to override it?"

I say no. (have tried saying yes also, same end result)

But "RH_clench SEEDING" is renamed "L_FiberTracts", and the data is overwritten anyway.