vgcfgrestore [-d|--debug] [-f|--file filename] [-l[l]|--list]
[-h|--help] [-M|--Metadatatype1|2] [-t|--test] [-v|--verbose]
'VolumeGroupName' is not in brackets, and is therefore a required parameter.
So the list, "vgcfgrestore -l fluidVG_125094317679" was correct.
The actual restore would be in the format "vgcfgrestore -f <filename> <vg_name>".
The '-f' flag requires a filename, so either of these should work.
vgcfgrestore -f /etc/lvm/archive/fluidVG_125094317679_00126-1479850541.vg fluidVG_125094317679
vgcfgrestore -f /etc/lvm/backup/fluidVG_125094317679 fluidVG_125094317679
Double check, triple check the content of them to make sure that it is what you want restored. 'vgcfgrestore' is not a fine surgical instrument, it's more of a sledgehammer...