From the paper -
"This systematic error erroneously ele-
vates the GMSL trend during 1993–1998 by between 0.9 ± 0.5
and 1.5 ± 0.5 mm yr −1 , depending on whether a glacial isostatic
adjustment (GIA) or Global Positioning System (GPS) data set was
used to correct for the effects of land motion at tide gauges used
in the bias estimation process. After removing these biases, the
estimated rate of GMSL rise from 1993 to mid-2014 was between
2.6 ± 0.4 and 2.9 ± 0.4 mm yr −1 , with a positive but not statistically
significant acceleration of 0.041 ± 0.058 mm yr −2 , compared with a
not statistically significant deceleration of −0.057 ± 0.058 mm yr −2
for unadjusted data."
https://sci-hub.tw/10.1038/nclimate3325