# PG::FeatureNotSupported: ERROR:

**URL:** https://community.zammad.org/t/pg-error/6839
**Category:** Technical assistance
**Created:** [May 6, 2021, 9:11am UTC](https://community.zammad.org/t/pg-error/6839 "2021-05-06T09:11:18Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![fuerni81](https://community.zammad.org/user_avatar/community.zammad.org/fuerni81/32/4191_2.png) [@fuerni81](https://community.zammad.org/u/fuerni81)
#### Post date: [May 6, 2021, 9:11am UTC](https://community.zammad.org/t/pg-error/6839/1 "2021-05-06T09:11:18Z")

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### Infos:

- Used Zammad version: 4.0
- Used Zammad installation type: source
- Operating system: Debian GNU/Linux 10 (buster)
- Browser + version: Firefox

### Expected behavior:

- ldap sync working

### Actual behavior:

- dap sync not working

### Steps to reproduce the behavior:

- I addded an attribute “title” to the object user, at ldap mapping I got the error  
“zammad PG::FeatureNotSupported: ERROR: cached plan must not change result type”

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<div class="post-metadata">

### Author: ![system](https://community.zammad.org/uploads/default/original/1X/5c5afaea2d23f811dbec33cd4edb02fa29d3262f.png) [@system](https://community.zammad.org/u/system)
#### Post date: [September 3, 2021, 9:12am UTC](https://community.zammad.org/t/pg-error/6839/2 "2021-09-03T09:12:10Z")

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