is

LEF read, Line 77 (Message): Unknown keyword "ANTENNAMODEL" in LEF file; ignoring.
LEF read, Line 78 (Message): Unknown keyword "ANTENNADIFFSIDEAREARATIO" in LEF file; ignoring.
LEF read, Line 111 (Message): Unknown keyword "ANTENNAMODEL" in LEF file; ignoring.
LEF read, Line 112 (Message): Unknown keyword "ANTENNADIFFSIDEAREARATIO" in LEF file; ignoring.
LEF read, Line 118 (Message): Unknown keyword "MAXIMUMDENSITY" in LEF file; ignoring.
LEF read, Line 119 (Message): Unknown keyword "DENSITYCHECKWINDOW" in LEF file; ignoring.
LEF read, Line 120 (Message): Unknown keyword "DENSITYCHECKSTEP" in LEF file; ignoring.
LEF read, Line 159 (Message): Unknown keyword "ANTENNAMODEL" in LEF file; ignoring.
LEF read, Line 160 (Message): Unknown keyword "ANTENNADIFFSIDEAREARATIO" in LEF file; ignoring.

problematic or is it benign?

I think I've seen these every time and it hasn't affected anything, I might've asked about them at some point, I'll see if these logs were the ones it was related to

AFAIK those are fine.