[FIX] hr: allow version deletion for employees with multiple versions

This makes it possible to delete a version if there are multiple versions for one employee.

Task: 5232093

Author: HashemKhaled

addons/hr/models/hr_employee.py

@@ -495,7 +495,8 @@ def _compute_legal_name(self):
     @api.depends('current_version_id')
     @api.depends_context('version_id')
     def _compute_version_id(self):
-        context_version = self.env['hr.version'].browse(self.env.context.get('version_id', False))
+        context_version_id = self.env.context.get('version_id', False)
+        context_version = self.env['hr.version'].browse(context_version_id).exists() if context_version_id else self.env['hr.version']
 
         for employee in self:
             if context_version.employee_id == self:

addons/hr/tests/test_hr_version.py

@@ -676,3 +676,20 @@ def test_hr_version_fields_tracking(self):
             fields_without_tracking,
             f"The following hr.version fields should have tracking=True: {fields_without_tracking}",
         )
+
+    def test_delete_hr_version(self):
+        employee = self.env['hr.employee'].create(
+            {
+                'name': 'John Doe',
+                'date_version': '2024-01-01',
+            }
+        )
+
+        version1 = employee.version_id
+        version2 = employee.create_version({
+            'date_version': '2025-01-01',
+        })
+
+        version1.unlink()
+        with self.assertRaises(ValidationError):
+            version2.unlink()