# Group mention prevents editing topic
**URL:** https://meta.discourse.org/t/group-mention-prevents-editing-topic/71303
**Category:** Support
**Created:** [October 3, 2017, 10:17am UTC](https://meta.discourse.org/t/group-mention-prevents-editing-topic/71303 "2017-10-03T10:17:57Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@hellekin](https://meta.discourse.org/u/hellekin)
#### Post date: [October 3, 2017, 10:18am UTC](https://meta.discourse.org/t/group-mention-prevents-editing-topic/71303/1 "2017-10-03T10:18:01Z")
## Situation
After editing a topic’s description post containing a group mention, the server returns 500, preventing the edition.
## Diagnostic
Log says “TypeError: Discourse.Markdown is undefined Url: [https://ps.zoethical.com/assets/plugin-third-party-4d3728cb346366b10ae699230b046fac450fb2e79749c551e62df3d5756b4456.js](https://ps.zoethical.com/assets/plugin-third-party-4d3728cb346366b10ae699230b046fac450fb2e79749c551e62df3d5756b4456.js) Line: 9 Column: 12674 Window Location”:
```plaintext
@https://ps.zoethical.com/assets/plugin-third-party-4d3728cb346366b10ae699230b046fac450fb2e79749c551e62df3d5756b4456.js:9:12674
@https://ps.zoethical.com/assets/plugin-third-party-4d3728cb346366b10ae699230b046fac450fb2e79749c551e62df3d5756b4456.js:9:12663
```
It seems that one of the plugins is interfering with group mentions. But how to identify that plugin?
I had the occurrence already before upgrading to `1.9.0.beta11` but thought it was me using groups badly: I tried to send a group message, but failed with a similar error.
### List of plugins
```plaintext
- git clone https://github.com/discourse/docker_manager.git
- git clone https://github.com/discourse/discourse-spoiler-alert.git
- git clone https://github.com/discourse/discourse-voting.git
- git clone https://github.com/discourse/discourse-solved.git
- git clone https://github.com/discourse/discourse-assign.git
- git clone https://github.com/angusmcleod/discourse-locations.git
- git clone https://github.com/angusmcleod/discourse-events.git
- git clone https://github.com/lidel/discourse-openstreetmap.git
```
---
### Author:  [@dax](https://meta.discourse.org/u/dax)
#### Post date: [October 3, 2017, 3:58pm UTC](https://meta.discourse.org/t/group-mention-prevents-editing-topic/71303/2 "2017-10-03T15:58:17Z")
> [@hellekin](#):
>
> `git clone https://github.com/lidel/discourse-openstreetmap.git`
Not updated for 3 years, remove it, almost certainly it is interfering
---
### Author:  [@hellekin](https://meta.discourse.org/u/hellekin)
#### Post date: [October 4, 2017, 8:42am UTC](https://meta.discourse.org/t/group-mention-prevents-editing-topic/71303/3 "2017-10-04T08:42:16Z")
ping @lidel. Can you check?
Thank you @Trash for your insight.
---
### Author:  [@hellekin](https://meta.discourse.org/u/hellekin)
#### Post date: [October 4, 2017, 12:56pm UTC](https://meta.discourse.org/t/group-mention-prevents-editing-topic/71303/4 "2017-10-04T12:56:34Z")
@lidel created [Group mention prevents editing topic · Issue #2 · lidel/discourse-openstreetmap · GitHub](https://github.com/lidel/discourse-openstreetmap/issues/2)
---
### Author:  [@lidel](https://meta.discourse.org/u/lidel)
#### Post date: [October 21, 2017, 3:26pm UTC](https://meta.discourse.org/t/group-mention-prevents-editing-topic/71303/5 "2017-10-21T15:26:17Z")
Thank you for reporting this! 👍
FYI I’ve just updated [lidel/discourse-openstreetmap](https://github.com/lidel/discourse-openstreetmap.git) and it is safe to use again, no longer produces `TypeError` 🌵
---
### Author:  [@JammyDodger](https://meta.discourse.org/u/JammyDodger)
#### Post date: [June 8, 2024, 12:44pm UTC](https://meta.discourse.org/t/group-mention-prevents-editing-topic/71303/6 "2024-06-08T12:44:07Z")
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