diff --git a/backend/app/models/audit.py b/backend/app/models/audit.py
index 4b7e90f..7790336 100644
--- a/backend/app/models/audit.py
+++ b/backend/app/models/audit.py
@@ -81,9 +81,9 @@ class AuditLog(Base):
     user: Mapped[Optional["User"]] = relationship(foreign_keys=[user_id])
 
     __table_args__ = (
-        Index("idx_user", "user_id"),
-        Index("idx_entity", "entity_type", "entity_id"),
-        Index("idx_created", "created_at"),
+        Index("idx_al_user", "user_id"),
+        Index("idx_al_entity", "entity_type", "entity_id"),
+        Index("idx_al_created", "created_at"),
     )
 
 
diff --git a/backend/app/models/case.py b/backend/app/models/case.py
index 6e9f5d3..aeb7350 100644
--- a/backend/app/models/case.py
+++ b/backend/app/models/case.py
@@ -190,7 +190,7 @@ class CaseICDCode(Base):
     case: Mapped[Case] = relationship(back_populates="icd_codes")
 
     __table_args__ = (
-        Index("idx_case", "case_id"),
-        Index("idx_code", "icd_code"),
-        Index("idx_haupt", "icd_hauptgruppe"),
+        Index("idx_icd_case", "case_id"),
+        Index("idx_icd_code", "icd_code"),
+        Index("idx_icd_haupt", "icd_hauptgruppe"),
     )
diff --git a/backend/app/models/user.py b/backend/app/models/user.py
index 4ea0609..15910ba 100644
--- a/backend/app/models/user.py
+++ b/backend/app/models/user.py
@@ -102,8 +102,8 @@ class RefreshToken(Base):
     user: Mapped[User] = relationship(back_populates="refresh_tokens")
 
     __table_args__ = (
-        Index("idx_user", "user_id"),
-        Index("idx_token", "token_hash"),
+        Index("idx_rt_user", "user_id"),
+        Index("idx_rt_token", "token_hash"),
     )