ZBrushCentral

Question about "Freeze SubDivision Levels"

Everytime I use the brush ‘CurveStrapSnap’ I always get asked to “The mesh is composed of multiple subdivision levels. Delete or Freeze the subdivision levels and try again. Action cancelled”
(I need to work in high resolution) so when I click ‘Freeze SubDivision Levels’ I then click Divide to higher up the resolution again but again the message pops out again “The mesh is composed of multiple subdivision levels. Delete or Freeze the subdivision levels and try again. Action cancelled”

I can’t work in low resolution in freeze subdivision because right after unclicking it, the details that I’ve added stay low resolution. If you have a solution please let me know! Thanks in advance!

I dont know how to undo this operation without changing my sculpt. I accidentally saved the tool that way. How can it be undone