Use the following command to update .target file to match contents of remote p2 repositories.

mvn org.sonatype.tycho.extras:tycho-version-bump-plugin:0.11.0-SNAPSHOT:update-target \
 -Dtycho.mode=maven -Dtycho-version=0.11.0-SNAPSHOT \
 -Dtarget=m2e-e37.target