Fixed the issue of removing of the library categories.Updated the core package version.

composer.lock

@@ -1467,16 +1467,16 @@
         },
         {
             "name": "monarc/core",
-            "version": "2.9.6",
+            "version": "2.9.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/monarc-project/zm-core.git",
-                "reference": "cc9faf3bf050de15a2e722a56a324f1990929573"
+                "reference": "56e8dfbd2c2320c953418a7650660733642ecef2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/monarc-project/zm-core/zipball/cc9faf3bf050de15a2e722a56a324f1990929573",
-                "reference": "cc9faf3bf050de15a2e722a56a324f1990929573",
+                "url": "https://api.github.com/repos/monarc-project/zm-core/zipball/56e8dfbd2c2320c953418a7650660733642ecef2",
+                "reference": "56e8dfbd2c2320c953418a7650660733642ecef2",
                 "shasum": ""
             },
             "require": {
@@ -1548,7 +1548,7 @@
                 }
             ],
             "description": "Core for monarc/monarc application",
-            "time": "2019-12-20T14:17:58+00:00"
+            "time": "2019-12-20T15:35:08+00:00"
         },
         {
             "name": "monarc/frontoffice",
@@ -1556,12 +1556,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/monarc-project/zm-client.git",
-                "reference": "b35200d5c42bdf7508042dc47a4dc3d3a50c9e04"
+                "reference": "3259d59edc37920f3971b166bc9845fa3a031cea"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/monarc-project/zm-client/zipball/b35200d5c42bdf7508042dc47a4dc3d3a50c9e04",
-                "reference": "b35200d5c42bdf7508042dc47a4dc3d3a50c9e04",
+                "url": "https://api.github.com/repos/monarc-project/zm-client/zipball/3259d59edc37920f3971b166bc9845fa3a031cea",
+                "reference": "3259d59edc37920f3971b166bc9845fa3a031cea",
                 "shasum": ""
             },
             "require": {
@@ -1627,7 +1627,7 @@
                 }
             ],
             "description": "Frontoffice for monarc/monarc application",
-            "time": "2019-12-19T08:39:06+00:00"
+            "time": "2019-12-18T10:11:50+00:00"
         },
         {
             "name": "monarc/phpword",