diff --git a/libraries/entropy.py b/libraries/entropy.py
index 6e377d5fa..bf876e81f 100644
--- a/libraries/entropy.py
+++ b/libraries/entropy.py
@@ -12527,6 +12527,11 @@ class ServerInterface(TextInterface):
             instance.closeDB()
 
     def switch_default_repository(self, repoid, save = None):
+
+        # avoid setting __default__ as default server repo
+        if repoid == etpConst['clientserverrepoid']:
+            return
+
         if save == None:
             save = self.do_save_repository
         if repoid not in etpConst['server_repositories']:
@@ -12621,6 +12626,11 @@ class ServerInterface(TextInterface):
 
 
     def save_default_repository(self, repoid):
+
+        # avoid setting __default__ as default server repo
+        if repoid == etpConst['clientserverrepoid']:
+            return
+
         if os.path.isfile(etpConst['serverconf']):
             f = open(etpConst['serverconf'],"r")
             content = f.readlines()
@@ -12648,6 +12658,11 @@ class ServerInterface(TextInterface):
             f.close()
 
     def toggle_repository(self, repoid, enable = True):
+
+        # avoid setting __default__ as default server repo
+        if repoid == etpConst['clientserverrepoid']:
+            return False
+
         if not os.path.isfile(etpConst['serverconf']):
             return None
         f = open(etpConst['serverconf'])
@@ -12999,6 +13014,19 @@ class ServerInterface(TextInterface):
 
         switched = set()
 
+        # avoid setting __default__ as default server repo
+        if etpConst['clientserverrepoid'] in (to_repo,from_repo):
+            self.updateProgress(
+                "%s: %s" % (
+                        blue(_("You cannot switch packages from/to your system database")),
+                        red(etpConst['clientserverrepoid']),
+                ),
+                importance = 2,
+                type = "warning",
+                header = darkred(" @@ ")
+            )
+            return switched
+
         if not matches and from_repo:
             dbconn = self.openServerDatabase(read_only = True, no_upload = True, repo = from_repo)
             matches = set( \
@@ -15807,6 +15835,11 @@ class ServerMirrorsInterface:
         server_repos = etpConst['server_repositories'].keys()
         all_actions = set()
         for myrepo in server_repos:
+
+            # avoid __default__
+            if myrepo == etpConst['clientserverrepoid']:
+                continue
+
             mydbc = self.Entropy.openServerDatabase(just_reading = True, repo = myrepo)
             actions = mydbc.listAllTreeUpdatesActions(no_ids_repos = True)
             for data in actions:
diff --git a/server/server_activator.py b/server/server_activator.py
index 5a474b300..c3501157d 100644
--- a/server/server_activator.py
+++ b/server/server_activator.py
@@ -53,6 +53,10 @@ def sync(options, justTidy = False):
 
     for repo in repos:
 
+        # avoid __default__
+        if repo == etpConst['clientserverrepoid']:
+            continue
+
         if repo != Entropy.default_repository:
             Entropy.switch_default_repository(repo)
 
@@ -106,6 +110,10 @@ def packages(options):
 
         for repo in repos:
 
+            # avoid __default__
+            if repo == etpConst['clientserverrepoid']:
+                continue
+
             if repo != Entropy.default_repository:
                 Entropy.switch_default_repository(repo)
 
@@ -194,6 +202,10 @@ def database(options):
         problems = 0
         for repo in repos:
 
+            # avoid __default__
+            if repo == etpConst['clientserverrepoid']:
+                continue
+
             if repo != Entropy.default_repository:
                 Entropy.switch_default_repository(repo)