# Task OP-4564 - How to fix error "Relation type is not set to one of the allowed values"

Project: OpenProject
Status: rejected
URL: https://community.openproject.org/work_packages/OP-4564

## Details

| Attribute | Value |
| --- | --- |
| Assignee |  |
| Date |  |
| Priority | High |
| Target versions | 7.4.2 |
| Category |  |
| Labels |  |

## Description

Hi\!  
I am Luật. I need your help.

When I used openproject 7.4, while creating a relationship between tasks, the software reported an error: “Relation type is not set to one of the allowed values”.

To understand more about my question, see the attached file.  
Thanks so much for reading this