The 1.1.0 release of the Radix node software runs on Java 17. If you need to rollback your Radix Node to an earlier release that used Java 11, you can change the Java version as follows:
sudo update-alternatives --config java
# There are 2 choices for the alternative java (providing /usr/bin/java).
#
# Selection Path Priority Status
# ------------------------------------------------------------
# * 0 /usr/lib/jvm/java-17-openjdk-amd64/bin/java 1711 auto mode
# 1 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 manual mode
# 2 /usr/lib/jvm/java-17-openjdk-amd64/bin/java 1711 manual mode
#
# Press <enter> to keep the current choice[*], or type selection number:
To switch to Java 11 you would type 1
and then enter.
To revert back to Java 17, you would type 0
to auto select the highest version (Java 17).