ZFS invalid character 'n' in name

1

I ran urbacksrv remove-unknown (version 2.5.33) and it outputs the following error

annot open 'data1/urbackup/files/hal1111/240816-1605,data1/urbackup/files/hal1111/240816-1206': invalid character ',' in name

What is the cause?

2

At a guess, the comma in the filename, just like the error says.