maven install faile

[currysu]

[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] docdoku-plm DocDokuPLM ............................. SUCCESS [ 0.646 s]
[INFO] docdoku-api ........................................ FAILURE [ 2.153 s]
[INFO] docdoku-api-java ................................... SKIPPED
[INFO] docdoku-api-js ..................................... SKIPPED
[INFO] docdoku-cli Command Line Interface ................. SKIPPED
[INFO] Attributes importer ................................ SKIPPED
[INFO] importer-attributes-ejb ............................ SKIPPED
[INFO] importer-attributes-ear ............................ SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.365 s
[INFO] Finished at: 2020-06-08T13:44:48+08:00
[INFO] Final Memory: 13M/225M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project docdoku-api: Could not resolve dependencies for project com.docdoku:docdoku-api:jar:2.6.0-SNAPSHOT: The following artifacts could not be resolved: org.polarsys.eplmp:eplmp-core:jar:2.6.0-SNAPSHOT, org.polarsys.eplmp:eplmp-server-rest:jar:sources:2.6.0-SNAPSHOT: Could not find artifact org.polarsys.eplmp:eplmp-core:jar:2.6.0-SNAPSHOT -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn -rf :docdoku-api

how can i solve this problem? thanks