GA381 appears to have the wrong shelf number. At this link: https://digi.ub.uni-heidelberg.de/diglit/bav_pal_gr_20
The manuscript of Luke with commentary shows the shelf number Pal. Gr. 20. The matching Liste number GA381 wrongly says it is Vat. Gr. 20. The above link also has new color images of the manuscript.
Similarly, GA151 is shown on the Liste as shelf number Vat. Gr. 220. The page includes a link to external images which are under the shelf number Pal. Gr. 220.
Update: I also found the same condition in GA147 where the shelf number at the Vatican is Pal. Gr. 89, but the Liste says Vat. Gr. 89. Here is the link with new color images of GA147: https://digi.ub.uni-heidelberg.de/diglit/bav_pal_gr_89.
Also GA146 is found to have the same shelf number problem. Here is the link to new images of his manuscript: https://digi.ub.uni-heidelberg.de/diglit/bav_pal_gr_5
Thank you very much, Darrell! These errors crept in when the printed Liste data was entered into the VMR. I'm glad to have them fixed now. We should have the images uploaded on the VMR soon.