DockeBuild.sh UID conflict

[alienkenny]

Hi, I have some problems and I don't know what is the best approach.
After some attempts (change in Dockerfile libwebkit2gtk-4.0-dev > libwebkit2gtk-4.1-dev, not enough ram > create a bigger swap) now i got a conflict between raspberry pi UID and Docker Ubuntu UID, what should I do?
P.S. I'm still a beginer in Linux

:~/OrcaSlicer $ ./DockerBuild.sh

=> [11/12] RUN ./BuildLinux.sh -ir 30.3s
=> ERROR [12/12] RUN [[ "1000" != "0" ]] && groupadd -f -g 1000 pi && useradd -u 1000 -g 1000 pi 0.8s

[12/12] RUN [[ "1000" != "0" ]] && groupadd -f -g 1000 pi && useradd -u 1000 -g 1000 brodo:
0.398 useradd: UID 1000 is not unique

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2 warnings found (use docker --debug to expand):

• LegacyKeyValueFormat: "LABEL key=value" should be used instead of legacy "LABEL key value" format (line 2)
• WorkdirRelativePath: Relative workdir "OrcaSlicer" can have unexpected results if the base image changes (line 66)
  Dockerfile:91

---

90 | ARG GID=0
91 | >>> RUN [[ "$UID" != "0" ]]
92 | >>> && groupadd -f -g $GID $USER
93 | >>> && useradd -u $UID -g $GID $USER
94 |

ERROR: failed to solve: process "/bin/bash -l -c [[ "$UID" != "0" ]] && groupadd -f -g $GID $USER && useradd -u $UID -g $GID $USER" did not complete successfully: exit code: 4