[IMP] Improve ospp_base and ospp_slide modules

addons/ospp_slide/models/models.py

@@ -228,7 +228,7 @@ class ChannelInstance(models.Model):
 
             response = requests.request("POST", url, headers=headers, data=urlencode(payload), verify=False)
             rec.message = response.text
-            if response.status_code == 200 and 'error' not in response.text:
+            if response.status_code == 200 and ('error' not in response.text or 'exists' in response.text):
                 rec.instance_created = True
             return True