Hi,

In Odoo, you can control access rights for users by assigning them to specific groups and granting the appropriate permissions to each group. For example, if you want a user to be able to create issues, but not edit existing ones, you can create a new group and grant the "Create" permission for the "Project Issue" model to that group. Then, add the user to that group. This will allow the user to create new issues, but not edit existing ones.

To change access rights for a specific model in Odoo, follow these steps:

1. Go to the "Settings" menu and select "Users and Companies".
2. Select the group that you want to edit the access rights for
3. Click on the "Access Rights" tab
4. Find the model that you want to modify access rights for (e.g. "Project Issue") in the list of models
5. Check or uncheck the boxes next to the permissions that you want to grant or revoke for that group. For example, if you want to allow the group to create new issues but not edit existing ones, you would check the "Create" box and uncheck the "Write" and "Delete" boxes
6. Click the "Save" button to apply your changes.
   

Regards