diff --git a/aleksis/apps/chronos/models.py b/aleksis/apps/chronos/models.py
index 77f27c92ca0e918255ab937f57f9e20a1de55169..97f701ee1c3bc2fd591a7572dff96e3844c03654 100644
--- a/aleksis/apps/chronos/models.py
+++ b/aleksis/apps/chronos/models.py
@@ -330,7 +330,7 @@ class Subject(ExtensibleModel):
         verbose_name_plural = _("Subjects")
         constraints = [
             models.UniqueConstraint(
-                fields=["site_id", "short_name"], name="unique_short_name_per_site"
+                fields=["site_id", "short_name"], name="unique_short_name_per_site_subject"
             ),
             models.UniqueConstraint(fields=["site_id", "name"], name="unique_name_per_site"),
         ]
@@ -353,7 +353,7 @@ class Room(ExtensibleModel):
         verbose_name_plural = _("Rooms")
         constraints = [
             models.UniqueConstraint(
-                fields=["site_id", "short_name"], name="unique_short_name_per_site"
+                fields=["site_id", "short_name"], name="unique_short_name_per_site_room"
             ),
         ]
 
@@ -627,7 +627,7 @@ class AbsenceReason(ExtensibleModel):
         verbose_name_plural = _("Absence reasons")
         constraints = [
             models.UniqueConstraint(
-                fields=["site_id", "short_name"], name="unique_short_name_per_site"
+                fields=["site_id", "short_name"], name="unique_short_name_per_site_absence_reason"
             ),
         ]
 
@@ -800,7 +800,7 @@ class SupervisionArea(ExtensibleModel):
         verbose_name_plural = _("Supervision areas")
         constraints = [
             models.UniqueConstraint(
-                fields=["site_id", "short_name"], name="unique_short_name_per_site"
+                fields=["site_id", "short_name"], name="unique_short_name_per_site_supervision_area"
             ),
         ]
 
@@ -866,7 +866,7 @@ class Break(ValidityRangeRelatedExtensibleModel):
         verbose_name_plural = _("Breaks")
         constraints = [
             models.UniqueConstraint(
-                fields=["site_id", "short_name"], name="unique_short_name_per_site"
+                fields=["site_id", "short_name"], name="unique_short_name_per_site_break"
             ),
         ]