RepositoryException warning logged when opening a revision of a document

[INFO] [talledLocalContainer] 25.07.2018 10:52:30 WARN  http-nio-9080-exec-1 [HippostdPublishableEditor.getEditorModel:212] Editing workflow not of type EditableWorkflow
[INFO] [talledLocalContainer] javax.jcr.RepositoryException: Editing workflow not of type EditableWorkflow
[INFO] [talledLocalContainer]   at org.hippoecm.frontend.editor.HippostdPublishableEditor.getDocumentWorkflow(HippostdPublishableEditor.java:416) ~[hippo-cms-workflow-frontend-5.5.0-campaigns-psp1-SNAPSHOT.jar:5.5.0-campaigns-psp1-SNAPSHOT]
[INFO] [talledLocalContainer]   at org.hippoecm.frontend.editor.HippostdPublishableEditor.getEditorModel(HippostdPublishableEditor.java:210) ~[hippo-cms-workflow-frontend-5.5.0-campaigns-psp1-SNAPSHOT.jar:5.5.0-campaigns-psp1-SNAPSHOT]
[INFO] [talledLocalContainer]   at org.hippoecm.frontend.editor.HippostdPublishableEditor.refresh(HippostdPublishableEditor.java:662) ~[hippo-cms-workflow-frontend-5.5.0-campaigns-psp1-SNAPSHOT.jar:5.5.0-campaigns-psp1-SNAPSHOT]
[INFO] [talledLocalContainer]   at org.hippoecm.frontend.plugins.cms.edit.EditorManagerPlugin.refresh(EditorManagerPlugin.java:208) ~[hippo-cms-perspectives-5.5.0-campaigns-psp1-SNAPSHOT.jar:5.5.0-campaigns-psp1-SNAPSHOT]
[INFO] [talledLocalContainer]   at java.util.ArrayList.forEach(ArrayList.java:1257) [?:1.8.0_181]
[INFO] [talledLocalContainer]   at org.hippoecm.frontend.PluginPage.processEvents(PluginPage.java:222) [hippo-cms-engine-5.5.0-campaigns-psp1-SNAPSHOT.jar:5.5.0-campaigns-psp1-SNAPSHOT]
}