diff --git a/litecord/blueprints/channel/messages.py b/litecord/blueprints/channel/messages.py
index 6a49e9c..f051f1f 100644
--- a/litecord/blueprints/channel/messages.py
+++ b/litecord/blueprints/channel/messages.py
@@ -32,6 +32,7 @@ from litecord.enums import MessageType, ChannelType, GUILD_CHANS
 from litecord.snowflake import get_snowflake
 from litecord.schemas import validate, MESSAGE_CREATE
 from litecord.utils import pg_set_json
+from litecord.permissions import get_permissions
 
 from litecord.embed.sanitizer import fill_embed
 from litecord.embed.messages import process_url_embed
@@ -360,6 +361,14 @@ async def msg_add_attachment(message_id: int, channel_id: int,
     return attachment_id
 
 
+async def _spawn_embed(app_, payload, **kwargs):
+    app_.sched.spawn(
+        process_url_embed(
+            app_.config, app_.storage, app_.dispatcher, app_.session,
+            payload, **kwargs)
+    )
+
+
 @bp.route('/<int:channel_id>/messages', methods=['POST'])
 async def _create_message(channel_id):
     """Create a message."""
@@ -424,12 +433,9 @@ async def _create_message(channel_id):
                                   'MESSAGE_CREATE', payload)
 
     # spawn url processor for embedding of images
-    app.sched.spawn(
-        process_url_embed(
-            app.config, app.storage, app.dispatcher, app.session,
-            payload
-        )
-    )
+    perms = await get_permissions(user_id, channel_id)
+    if perms.bits.embed_links:
+        await _spawn_embed(app, payload)
 
     # update read state for the author
     await app.db.execute("""
@@ -487,17 +493,14 @@ async def edit_message(channel_id, message_id):
         # the artificial delay keeps consistency between the events, since
         # it makes more sense for the MESSAGE_UPDATE with new content to come
         # BEFORE the MESSAGE_UPDATE with the new embeds (based on content)
-        app.sched.spawn(
-            process_url_embed(
-                app.config, app.storage, app.dispatcher, app.session,
-                {
-                    'id': message_id,
-                    'channel_id': channel_id,
-                    'content': j['content'],
-                    'embeds': old_message['embeds']
-                }, delay=0.2
-            )
-        )
+        perms = await get_permissions(user_id, channel_id)
+        if perms.bits.embed_links:
+            await _spawn_embed(app, {
+                'id': message_id,
+                'channel_id': channel_id,
+                'content': j['content'],
+                'embeds': old_message['embeds']
+            }, delay=0.2)
 
     # only set new timestamp upon actual update
     if updated:
diff --git a/litecord/blueprints/channels.py b/litecord/blueprints/channels.py
index bfb08dc..6711181 100644
--- a/litecord/blueprints/channels.py
+++ b/litecord/blueprints/channels.py
@@ -278,26 +278,25 @@ async def _mass_chan_update(guild_id, channel_ids: List[Optional[int]]):
 async def _process_overwrites(channel_id: int, overwrites: list):
     for overwrite in overwrites:
 
-        # 0 for user overwrite, 1 for role overwrite
-        target_type = 0 if overwrite['type'] == 'user' else 1
+        # 0 for member overwrite, 1 for role overwrite
+        target_type = 0 if overwrite['type'] == 'member' else 1
         target_role = None if target_type == 0 else overwrite['id']
         target_user = overwrite['id'] if target_type == 0 else None
 
+        col_name = 'target_user' if target_type == 0 else 'target_role'
+        constraint_name = f'channel_overwrites_{col_name}_uniq'
+
         await app.db.execute(
-            """
+            f"""
             INSERT INTO channel_overwrites
                 (channel_id, target_type, target_role,
                 target_user, allow, deny)
             VALUES
                 ($1, $2, $3, $4, $5, $6)
-            ON CONFLICT ON CONSTRAINT channel_overwrites_uniq
+            ON CONFLICT ON CONSTRAINT {constraint_name}
             DO
             UPDATE
                 SET allow = $5, deny = $6
-                WHERE channel_overwrites.channel_id = $1
-                  AND channel_overwrites.target_type = $2
-                  AND channel_overwrites.target_role = $3
-                  AND channel_overwrites.target_user = $4
             """,
             channel_id, target_type,
             target_role, target_user,
diff --git a/litecord/embed/messages.py b/litecord/embed/messages.py
index a7004f8..1267538 100644
--- a/litecord/embed/messages.py
+++ b/litecord/embed/messages.py
@@ -156,7 +156,7 @@ async def process_url_embed(config, storage, dispatcher,
     if not new_embeds:
         return
 
-    log.debug('made {} thumbnail embeds for mid {}',
+    log.debug('made {} embeds for mid {}',
               len(new_embeds), message_id)
 
     await msg_update_embeds(payload, new_embeds, storage, dispatcher)
diff --git a/litecord/storage.py b/litecord/storage.py
index 79d07dd..58c7bd6 100644
--- a/litecord/storage.py
+++ b/litecord/storage.py
@@ -403,9 +403,9 @@ class Storage:
             drow = dict(row)
 
             target_type = drow['target_type']
-            drow['type'] = 'user' if target_type == 0 else 'role'
+            drow['type'] = 'member' if target_type == 0 else 'role'
 
-            # if type is 0, the overwrite is for a user
+            # if type is 0, the overwrite is for a member
             # if type is 1, the overwrite is for a role
             drow['id'] = {
                 0: drow['target_user'],
diff --git a/manage/cmd/migration/scripts/2_fix_chan_overwrites_constraint.sql b/manage/cmd/migration/scripts/2_fix_chan_overwrites_constraint.sql
new file mode 100644
index 0000000..7816d00
--- /dev/null
+++ b/manage/cmd/migration/scripts/2_fix_chan_overwrites_constraint.sql
@@ -0,0 +1,10 @@
+ALTER TABLE channel_overwrites
+    DROP CONSTRAINT IF EXISTS channel_overwrites_uniq;
+
+ALTER TABLE channel_overwrites
+    ADD CONSTRAINT channel_overwrites_target_role_uniq
+    UNIQUE (channel_id, target_role);
+
+ALTER TABLE channel_overwrites
+    ADD CONSTRAINT channel_overwrites_target_user_uniq
+    UNIQUE (channel_id, target_user);