diff --git a/apps/ofm/migrations/0022_alter_mroomslot_unique_together.py b/apps/ofm/migrations/0022_alter_mroomslot_unique_together.py
new file mode 100644
index 00000000..6bdc67b4
--- /dev/null
+++ b/apps/ofm/migrations/0022_alter_mroomslot_unique_together.py
@@ -0,0 +1,17 @@
+# Generated by Django 3.2.12 on 2025-10-17 06:50
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('ofm', '0021_alter_publicity_publicity_opinion'),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name='mroomslot',
+            unique_together=set(),
+        ),
+    ]
diff --git a/apps/ofm/models.py b/apps/ofm/models.py
index 6fc1d986..b5fdd1b0 100644
--- a/apps/ofm/models.py
+++ b/apps/ofm/models.py
@@ -44,9 +44,6 @@ class MroomSlot(BaseModel):
     mdate = models.DateField('会议日期', db_index=True)
     slot = models.PositiveIntegerField('时段', help_text='0-47')
     is_inuse = models.BooleanField('是否占用', default=True)
-    
-    class Meta:
-        unique_together = ('mroom', 'mdate', 'slot', 'is_inuse')
 
 
 # class Seal(BaseModel):
diff --git a/apps/ofm/serializers.py b/apps/ofm/serializers.py
index c9aeee51..9b11a9f1 100644
--- a/apps/ofm/serializers.py
+++ b/apps/ofm/serializers.py
@@ -37,10 +37,10 @@ class MroomBookingSerializer(CustomModelSerializer):
         for slot in slots:
             if slot < 0 or slot > 47:
                 raise ParseError("时段索引超出范围")
-            try:
-                MroomSlot.objects.create(booking=booking, slot=slot, mdate=mdate, mroom=mroom, is_inuse=True)
-            except Exception as e:
-                raise ParseError(f"时段已预订,请刷新重选-{e}")
+            ms_exists = MroomSlot.objects.filter(mroom=mroom, mdate=mdate, slot=slot, is_inuse=True).exists()
+            if ms_exists:
+                raise ParseError("时段已预订,请刷新重选")
+            MroomSlot.objects.create(booking=booking, slot=slot, mdate=mdate, mroom=mroom, is_inuse=True)
         return booking
 
     def update(self, instance, validated_data):
@@ -52,10 +52,10 @@ class MroomBookingSerializer(CustomModelSerializer):
         for slot in slots:
             if slot < 0 or slot > 47:
                 raise ParseError("时段索引超出范围")
-            try:
-                MroomSlot.objects.create(booking=booking, slot=slot, mdate=mdate, mroom=mroom, is_inuse=True)
-            except Exception as e:
-                raise ParseError(f"时段已预订,请刷新重选-{e}")
+            ms_exists = MroomSlot.objects.filter(mroom=mroom, mdate=mdate, slot=slot, is_inuse=True).exists()
+            if ms_exists:
+                raise ParseError("时段已预订,请刷新重选")
+            MroomSlot.objects.create(booking=booking, slot=slot, mdate=mdate, mroom=mroom, is_inuse=True)
         return booking