History output question

I need to restore a folder “sample_abc”. So I ran duplicacy history sample_abc, and got this (shortened manually):

snapshot sample_abc at revision 1 is encoded in an old version format
      1:
snapshot sample_abc at revision 2 is encoded in an old version format
      2:
snapshot sample_abc at revision 8 is encoded in an old version format
      8:
snapshot sample_abc at revision 22 is encoded in an old version format
     22:
snapshot sample_abc at revision 40 is encoded in an old version format
     40:
snapshot sample_abc at revision 48 is encoded in an old version format
     48:
snapshot sample_abc at revision 53 is encoded in an old version format
     53:
snapshot sample_abc at revision 54 is encoded in an old version format
     54:
     66:
     67:
     68:
     69:
     70:
     71:
     72:
     73:
     74:
     75:
     76:
     77:
     78:
     79:
     80:
     81:
     82:
     83:
     84:
     85:
     86:
     87:
     88:
32 chunks have been allocated
     89:
33 chunks have been allocated
     90:
34 chunks have been allocated
     91:
35 chunks have been allocated
     92:
36 chunks have been allocated
     93:
37 chunks have been allocated
     94:
38 chunks have been allocated
     95:
39 chunks have been allocated
     96:
40 chunks have been allocated
     97:
41 chunks have been allocated
     98:
42 chunks have been allocated
     99:
43 chunks have been allocated
    100:
44 chunks have been allocated
    101:
current:

q1: What does “snapshot sample_abc at revision 1 is encoded in an old version format” tell me about revisions 1-54?

q2: Beginning with revision 89, I am seeing “x chunks have been allocated”. What does that mean to me? Should I be concerned. And why is there no mention of chucnks prior to revision 89?

Thank you!

These revisions were created by CLI 2.7.2 or earlier using the old V2 format.

This message means too many chunks had been allocated due to a leak. It has been fixed in Release the chunk used to download files when finished · gilbertchen/duplicacy@b8c7594 · GitHub and included in the latest 3.1.0 release.