LogQL parser gets confused on | unwrap offset

[seizethedave]

Describe the bug
I have a log field called offset. This query:

max_over_time(
   {pod="block-builder-0"} |= "successfully committed offset to kafka" | logfmt | unwrap offset [1m]
)

gives me a parse error:

parse error at line 2, col 90: syntax error: unexpected offset, expecting IDENTIFIER or BYTES_CONV or DURATION_CONV or DURATION_SECONDS_CONV

because offset is a LogQL keyword.
To Reproduce

Just run the query.

Expected behavior
I expect that the parser might understand offset here is a label name.