diff --git a/alembic/versions/fd73601a9075_add_delete_cascade_studies.py b/alembic/versions/fd73601a9075_add_delete_cascade_studies.py
index 2a4f5b6a44..ac063fe516 100644
--- a/alembic/versions/fd73601a9075_add_delete_cascade_studies.py
+++ b/alembic/versions/fd73601a9075_add_delete_cascade_studies.py
@@ -1,54 +1,69 @@
-"""Add delete cascade studies
+"""
+Add delete cascade constraint to study foreign keys
 
 Revision ID: fd73601a9075
 Revises: 3c70366b10ea
 Create Date: 2024-02-12 17:27:37.314443
-
 """
 from alembic import op
 
 # revision identifiers, used by Alembic.
-revision = 'fd73601a9075'
-down_revision = '3c70366b10ea'
+revision = "fd73601a9075"
+down_revision = "3c70366b10ea"
 branch_labels = None
 depends_on = None
 
+# noinspection SpellCheckingInspection
+RAWSTUDY_FK = "rawstudy_id_fkey"
+
+# noinspection SpellCheckingInspection
+VARIANTSTUDY_FK = "variantstudy_id_fkey"
+
+# noinspection SpellCheckingInspection
+STUDY_ADDITIONAL_DATA_FK = "study_additional_data_study_id_fkey"
+
+
+def upgrade() -> None:
+    dialect_name: str = op.get_context().dialect.name
+    if dialect_name == "postgresql":
+        with op.batch_alter_table("rawstudy", schema=None) as batch_op:
+            batch_op.drop_constraint(RAWSTUDY_FK, type_="foreignkey")
+            batch_op.create_foreign_key(RAWSTUDY_FK, "study", ["id"], ["id"], ondelete="CASCADE")
+
+        with op.batch_alter_table("study_additional_data", schema=None) as batch_op:
+            batch_op.drop_constraint(STUDY_ADDITIONAL_DATA_FK, type_="foreignkey")
+            batch_op.create_foreign_key(STUDY_ADDITIONAL_DATA_FK, "study", ["study_id"], ["id"], ondelete="CASCADE")
 
-def upgrade():
-    # connexion: Connection = op.get_bind()
-    # connexion.execute("DROP TABLE IF EXISTS _alembic_tmp_rawstudy")
-    print(op.get_context().dialect.name)
-    if op.get_context().dialect.name == 'postgresql':
-        print(op.get_context().dialect.name)
-        # ### commands auto generated by Alembic - please adjust! ###
-        with op.batch_alter_table('rawstudy', schema=None) as batch_op:
-            batch_op.drop_constraint('rawstudy_id_fkey', type_='foreignkey')
-            batch_op.create_foreign_key('rawstudy_id_fkey', 'study', ['id'], ['id'], ondelete='CASCADE')
+        with op.batch_alter_table("variantstudy", schema=None) as batch_op:
+            batch_op.drop_constraint(VARIANTSTUDY_FK, type_="foreignkey")
+            batch_op.create_foreign_key(VARIANTSTUDY_FK, "study", ["id"], ["id"], ondelete="CASCADE")
 
-        with op.batch_alter_table('study_additional_data', schema=None) as batch_op:
-            batch_op.drop_constraint('study_additional_data_study_id_fkey', type_='foreignkey')
-            batch_op.create_foreign_key('study_additional_data_study_id_fkey', 'study', ['study_id'], ['id'], ondelete='CASCADE')
+    elif dialect_name == "sqlite":
+        # Adding ondelete="CASCADE" to a foreign key in sqlite is not supported
+        pass
 
-        with op.batch_alter_table('variantstudy', schema=None) as batch_op:
-            batch_op.drop_constraint('variantstudy_id_fkey', type_='foreignkey')
-            batch_op.create_foreign_key('variantstudy_id_fkey', 'study', ['id'], ['id'], ondelete='CASCADE')
+    else:
+        raise NotImplementedError(f"{dialect_name=} not implemented")
 
-    # ### end Alembic commands ###
 
+def downgrade() -> None:
+    dialect_name: str = op.get_context().dialect.name
+    if dialect_name == "postgresql":
+        with op.batch_alter_table("rawstudy", schema=None) as batch_op:
+            batch_op.drop_constraint(RAWSTUDY_FK, type_="foreignkey")
+            batch_op.create_foreign_key(RAWSTUDY_FK, "study", ["id"], ["id"])
 
-def downgrade():
-    # ### commands auto generated by Alembic - please adjust! ###
-    if op.get_context().dialect.name == 'postgresql':
-        with op.batch_alter_table('variantstudy', schema=None) as batch_op:
-            batch_op.drop_constraint('rawstudy_id_fkey', type_='foreignkey')
-            batch_op.create_foreign_key('rawstudy_id_fkey', 'study', ['id'], ['id'])
+        with op.batch_alter_table("study_additional_data", schema=None) as batch_op:
+            batch_op.drop_constraint(STUDY_ADDITIONAL_DATA_FK, type_="foreignkey")
+            batch_op.create_foreign_key(STUDY_ADDITIONAL_DATA_FK, "study", ["study_id"], ["id"])
 
-        with op.batch_alter_table('study_additional_data', schema=None) as batch_op:
-            batch_op.drop_constraint('study_additional_data_study_id_fkey', type_='foreignkey')
-            batch_op.create_foreign_key('study_additional_data_study_id_fkey', 'study', ['study_id'], ['id'])
+        with op.batch_alter_table("variantstudy", schema=None) as batch_op:
+            batch_op.drop_constraint(VARIANTSTUDY_FK, type_="foreignkey")
+            batch_op.create_foreign_key(VARIANTSTUDY_FK, "study", ["id"], ["id"])
 
-        with op.batch_alter_table('rawstudy', schema=None) as batch_op:
-            batch_op.drop_constraint('variantstudy_id_fkey', type_='foreignkey')
-            batch_op.create_foreign_key('variantstudy_id_fkey', 'study', ['id'], ['id'])
+    elif dialect_name == "sqlite":
+        # Removing ondelete="CASCADE" to a foreign key in sqlite is not supported
+        pass
 
-    # ### end Alembic commands ###
+    else:
+        raise NotImplementedError(f"{dialect_name=} not implemented")