diff --git a/src/moin/apps/frontend/views.py b/src/moin/apps/frontend/views.py
index 1dc475075..339f87894 100644
--- a/src/moin/apps/frontend/views.py
+++ b/src/moin/apps/frontend/views.py
@@ -80,7 +80,6 @@
 from moin.signalling import item_displayed, item_modified
 from moin.storage.middleware.protecting import AccessDenied, gen_fqnames
 from moin.converters import default_registry as reg
-# from moin.cli.migration.moin19.import19 import hash_hexdigest
 from moin.storage.middleware.validation import validate_data
 import moin.utils.mimetype as mime_type
 
@@ -2397,7 +2396,11 @@ class UserSettingsUIForm(Form):
                                                             'verification email failed. Please try again later.'),
                                                           "error"))
                         else:
-                            flaskg.user.save()
+                            try:
+                                flaskg.user.save()
+                            except ValueError as err:
+                                response['flash'].append((str(err), 'error'))
+
             else:
                 # validation failed
                 response['flash'].append((_("Nothing saved."), "error"))
diff --git a/src/moin/storage/middleware/indexing.py b/src/moin/storage/middleware/indexing.py
index c3f4a47e1..194e3b99a 100644
--- a/src/moin/storage/middleware/indexing.py
+++ b/src/moin/storage/middleware/indexing.py
@@ -1221,9 +1221,14 @@ def store_revision(self, meta, data, overwrite=False,
             logging.warning("data validation skipped because metadata is invalid, see below")
             val = []
             for e in m.children:
-                logging.warning("{0}, {1}, {2}".format(e.valid, e.name, e.raw))
-                if e.valid is False:
+                if e.name == 'subscriptions':
+                    for sub in e.children:
+                        if sub.valid is False:
+                            val.append('"{}". {}'.format(str(sub), str(sub.errors[0])))
+                            e.valid = False
+                elif e.valid is False:
                     val.append(str(e))
+                logging.warning("{0}, {1}, {2}".format(e.valid, e.name, e.raw))
             if VALIDATION_HANDLING == VALIDATION_HANDLING_STRICT:
                 raise ValueError(_('Error: metadata validation failed, invalid field value(s) = {0}'.format(
                     ', '.join(val)