fix(bot): 🐛 p.skip not working.

payphone/cogs/calls/cog.py

@@ -327,18 +327,23 @@ class Calls(base.Cog):
         channel = find(lambda c: c.id == channel_id, call.channels)
         other_channel = find(lambda c: c.id != channel_id, call.channels)
 
-        other_channel.call = None
-        await other_channel.save()
+        if other_channel is not None:
+            other_channel.call = None
+            await other_channel.save()
 
-        try:
-            await self.bot.get_partial_messageable(other_channel.id).send(
-                f"☎️ {secrets.choice(constants.MSGS_PHONE_HANGUP_YOU)}"
-            )
-        except errors.DiscordException:
-            pass
+            try:
+                await self.bot.get_partial_messageable(other_channel.id).send(
+                    f"☎️ {secrets.choice(constants.MSGS_PHONE_HANGUP_YOU)}"
+                )
+            except errors.DiscordException:
+                pass
 
         await redis.srem(
-            constants.CHANNELS_ONCALL_SET, str(channel_id), str(other_channel.id)
+            constants.CHANNELS_ONCALL_SET,
+            *(
+                [str(channel_id)]
+                + ([str(other_channel.id)] if other_channel is not None else [])
+            ),
         )
 
         last_channel_calls = [