diff --git a/services/reviewhelper-api/alembic/versions/579adfa85713_add_index_for_platform_comment_id.py b/services/reviewhelper-api/alembic/versions/579adfa85713_add_index_for_platform_comment_id.py
new file mode 100644
index 0000000000..dba667c196
--- /dev/null
+++ b/services/reviewhelper-api/alembic/versions/579adfa85713_add_index_for_platform_comment_id.py
@@ -0,0 +1,38 @@
+"""Add index for platform comment id.
+
+Revision ID: 579adfa85713
+Revises: a6b26ceccd9f
+Create Date: 2026-02-18 11:27:56.953437
+
+"""
+
+from typing import Sequence, Union
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = "579adfa85713"
+down_revision: Union[str, Sequence[str], None] = "a6b26ceccd9f"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_index(
+        "ix_generated_comments_platform_comment_id",
+        "generated_comments",
+        ["platform_comment_id"],
+        unique=False,
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(
+        "ix_generated_comments_platform_comment_id", table_name="generated_comments"
+    )
+    # ### end Alembic commands ###