John Gill Commentary 2 Chronicles 33:17

"Nevertheless the people sacrificed still in the high places, but only unto Jehovah their God." — 2 Chronicles 33:17 (ASV)

Nevertheless, the people did sacrifice still in the high
places
Not in those that were built for idols, at least did not sacrifice to them; for it follows:

yet unto the Lord their God only ;
the Targum is, ``to the name of the Word of the Lord their God.''