It occurs that on some (1.9.x) projects, the same manager has been set twice:
For theses projects, BackOfficeAccessController failed with this error:
Category: org.ametys.core.right.RightManagerMessage: An error occured with controller 'org.ametys.plugins.workspaces.project.rights.accesscontroller.BackOfficeAccessController' for object '/ametys-internal:sites/france-relance-occitanie/ametys-internal:sitemaps/fr/alertes/nouvelle-page' (page://29511d93-5c9f-4df3-bff4-5c5062e63e67). Thus, this controller will be ignored.Location: org.ametys.core.right.RightManager._getAllowedUsers(RightManager.java:623)Thrown:java.lang.IllegalStateException: Duplicate key UserIdentity [login=6600558524, population=utilisateurs] (attempted merging values USER_ALLOWED and USER_ALLOWED) at java.base/java.util.stream.Collectors.duplicateKeyException(Collectors.java:133) at java.base/java.util.stream.Collectors.lambda$uniqKeysMapAccumulator$1(Collectors.java:180) at java.base/java.util.stream.ReduceOps$3ReducingSink.accept(ReduceOps.java:169) at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578) at org.ametys.plugins.workspaces.project.rights.accesscontroller.BackOfficeAccessController.getPermissionByUser(BackOfficeAccessController.java:186) at org.ametys.plugins.workspaces.project.rights.accesscontroller.BackOfficeAccessController.getReadAccessPermissionByUser(BackOfficeAccessController.java:195) at org.ametys.core.right.RightManager._getAllowedUsers(RightManager.java:591) at org.ametys.core.right.RightManager.getReadAccessAllowedUsers(RightManager.java:545) at org.ametys.cms.rights.solrchecking.ReadAccessHelper.allowedUsers(ReadAccessHelper.java:70)