Use different uuids for projectId, branchId, commidId.

[tomasz-bartler-mtsi]

Currently syson uses the same value of uuid for different types of entities.
Using the same UUID for different objects is generally not considered a good practice as it may cause significant issues with data integrity, searching, and identification.

Get projects:
ProjectId is the same as defaultBranch id:
[
{
"@id": "011048f3-8e83-4572-9110-1ca19cd711b0",
"@type": "Project",
"created": "1970-01-01T00:00:00Z",
"defaultBranch": {
"@id": "011048f3-8e83-4572-9110-1ca19cd711b0"
},
"description": null,
"name": "SysMLv2-Library"
},
{
"@id": "3e919478-6f75-4083-acff-48d145b45b14",
"@type": "Project",
"created": "1970-01-01T00:00:00Z",
"defaultBranch": {
"@id": "3e919478-6f75-4083-acff-48d145b45b14"
},
"description": null,
"name": "SysMLv2"
},
{
"@id": "c0253543-e587-48e3-b761-15fb95f607f6",
"@type": "Project",
"created": "1970-01-01T00:00:00Z",
"defaultBranch": {
"@id": "c0253543-e587-48e3-b761-15fb95f607f6"
},
"description": null,
"name": "Batmobile"
}
]

Get project commits:
CommitID is the same as owningProjectID
[
{
"@id": "c0253543-e587-48e3-b761-15fb95f607f6",
"@type": "Commit",
"created": "1970-01-01T00:00:00Z",
"description": "The one and only commit for this project",
"owningProject": {
"@id": "c0253543-e587-48e3-b761-15fb95f607f6"
},
"previousCommits": []
}
]

[AxelRICHARD]

Hello,

Thank you for using SysON.

In the default implementation of SysON, we chose to have only one branch and one commit, and it was simpler to have the same id than the project.
SysON is built upon on Sirius Web and is designed to be extensible.
So you can create your own implementation of org.eclipse.sirius.web.application.object.services.api.IObjectRestServiceDelegate (default is SysONObjectRestService) and org.eclipse.sirius.web.application.project.data.versioning.services.api.IProjectDataVersioningRestServiceDelegate(default is SysONProjectDataVersioningRestService) if you want to handle that with your own constraints.

Furthermore, if you need professional support, you can also visit this page: https://doc.mbse-syson.org/syson/v2026.3.0/user-manual/support.html

Hope it will help you.

Best regards,