Beam Release Process breaks by "Project '1.10' not found in project ':runners:flink'"

[1] introduces Flink 1.10 to build_release_candidate.sh. However, the release process failed due to:

:runners:flink:1.10:job-server-container:dockerPush

• What went wrong:
  Project '1.10' not found in project ':runners:flink'. Some candidates are: '1.7', '1.8', '1.9'.

In fact, I have seen such error message in release branch.

[1] https://github.com/apache/beam/commit/f91b390c8bbab4afe14734c1266da51dcc7558c9#diff-a2d9485e05b4434359d3253a0f52a791