  We report a non-detection of the [OI] 63-um emission line from the z = 6.03
galaxy G09.83808 using ALMA Band 9 observations, refuting the previously
claimed detection with APEX by (Rybak et al. 2020); the new upper limit on the
[OI] 63-um flux is almost 20-times lower. [OI] 63-um line could be a powerful
tracer of neutral gas in the Epoch of Reionisation: yet our null result shows
that detecting [OI] 63-um from z$\geq$6 galaxies is more challenging than
previously hypothesised.
