Only one team member can share deployments

**Describe the bug**
When one member of a team shares any amount of deployment it works as expected. The problem occurs if another member of said team shares a deployment, then all the other previously shared deployments become "unshared" and cannot be viewed anymore by the team members.

**To Reproduce**
Steps to reproduce the behavior:
1. One team member shares a deployment
2. Another team member shares a separate deployment
3. See that the first deployment cannot be viewed in the dashboard anymore by the team member to whom it was shared

**Expected behavior**
All members of a team should be able to share deployments with eachother.

**Desktop**
- OS: Microsoft Windows 11 Pro Version 10.0.22631 Build 22631
- Browser: Firefox
- Version 145.0.2 (64-bit)

**Additional context**
We are only two members in the team who produced the bug

Start by reproducing the two-member scenario in the dashboard: have one member share a deployment, then have the other share a separate deployment. Trace the deployment-sharing flow from the dashboard and inspect how previously shared deployments are represented. Done means both members can share separate deployments while retaining access to all deployments shared with them.

Written by the indexing model from the issue text.