diff --git a/backend/alembic/versions/c1a2b3d4e5f6_create_core_task_runs.py b/backend/alembic/versions/c1a2b3d4e5f6_create_core_task_runs.py
index dae5b1c5..2af79dcf 100644
--- a/backend/alembic/versions/c1a2b3d4e5f6_create_core_task_runs.py
+++ b/backend/alembic/versions/c1a2b3d4e5f6_create_core_task_runs.py
@@ -1,4 +1,4 @@
-"""create_core_task_runs
+"""create_core_task_runs and backfill code_pedimento_regimens
 
 Revision ID: c1a2b3d4e5f6
 Revises: bccb7f8986c7
@@ -11,6 +11,13 @@ from alembic import op
 import sqlalchemy as sa
 from sqlalchemy.dialects import postgresql
 
+from api.v1.modules.public.reference_data.code_pedimento_regimens.seed import (
+    seed as code_pedimento_regimens_seed_full,
+)
+from api.v1.modules.public.reference_data.pedimento_codes.seed import (
+    seed as pedimento_codes_seed,
+)
+
 
 # revision identifiers, used by Alembic.
 revision: str = "c1a2b3d4e5f6"
@@ -19,6 +26,12 @@ branch_labels: Union[str, Sequence[str], None] = None
 depends_on: Union[str, Sequence[str], None] = None
 
 
+def _format_value(val: str | None) -> str:
+    if val is None or str(val).strip() == "" or str(val).upper() == "NONE":
+        return "NULL"
+    return f"'{str(val).replace(chr(39), chr(39) * 2)}'"
+
+
 def upgrade() -> None:
     op.create_table(
         "task_runs",
@@ -75,6 +88,50 @@ def upgrade() -> None:
         schema="core",
     )
 
+    pedimento_desc_by_code = {code: desc for code, desc in pedimento_codes_seed}
+    required_pedimento_codes = sorted(
+        {pedimento_code for pedimento_code, _regimen_code, _type_code in code_pedimento_regimens_seed_full}
+    )
+
+    values_missing_codes = ", ".join(
+        [
+            f"({_format_value(code)}, {_format_value(pedimento_desc_by_code.get(code, f'AUTO-GENERATED FOR FK ({code})'))})"
+            for code in required_pedimento_codes
+        ]
+    )
+    op.execute(
+        f"""
+        INSERT INTO public.pedimento_codes (code, description)
+        VALUES {values_missing_codes}
+        ON CONFLICT (code) DO NOTHING;
+    """
+    )
+
+    values_relations = ", ".join(
+        [
+            f"({_format_value(pedimento_code)}, {_format_value(regimen_code)}, {_format_value(type_code)})"
+            for pedimento_code, regimen_code, type_code in code_pedimento_regimens_seed_full
+        ]
+    )
+    op.execute(
+        f"""
+        INSERT INTO public.code_pedimento_regimens (pedimento_code, regimen_code, type_code)
+        SELECT src.pedimento_code, src.regimen_code, src.type_code
+        FROM (VALUES {values_relations}) AS src(pedimento_code, regimen_code, type_code)
+        JOIN public.pedimento_codes pc
+            ON pc.code = src.pedimento_code
+        JOIN public.pedimento_regimens pr
+            ON pr.code = src.regimen_code
+        WHERE NOT EXISTS (
+            SELECT 1
+            FROM public.code_pedimento_regimens cpr
+            WHERE cpr.pedimento_code = src.pedimento_code
+              AND cpr.regimen_code = src.regimen_code
+              AND COALESCE(cpr.type_code, '') = COALESCE(src.type_code, '')
+        );
+    """
+    )
+
 
 def downgrade() -> None:
     op.drop_index("ix_core_task_runs_tenant_company_updated", table_name="task_runs", schema="core")
diff --git a/backend/alembic/versions/d4e5f6a7b8c9_backfill_full_code_pedimento_regimens.py b/backend/alembic/versions/d4e5f6a7b8c9_backfill_full_code_pedimento_regimens.py
deleted file mode 100644
index c28f7ba5..00000000
--- a/backend/alembic/versions/d4e5f6a7b8c9_backfill_full_code_pedimento_regimens.py
+++ /dev/null
@@ -1,82 +0,0 @@
-"""backfill_full_code_pedimento_regimens
-
-Revision ID: d4e5f6a7b8c9
-Revises: c1a2b3d4e5f6
-Create Date: 2026-03-24 13:10:00.000000
-"""
-
-from typing import Sequence, Union
-
-from alembic import op
-from api.v1.modules.public.reference_data.code_pedimento_regimens.seed import (
-    seed as code_pedimento_regimens_seed_full,
-)
-from api.v1.modules.public.reference_data.pedimento_codes.seed import (
-    seed as pedimento_codes_seed,
-)
-
-
-# revision identifiers, used by Alembic.
-revision: str = "d4e5f6a7b8c9"
-down_revision: Union[str, Sequence[str], None] = "c1a2b3d4e5f6"
-branch_labels: Union[str, Sequence[str], None] = None
-depends_on: Union[str, Sequence[str], None] = None
-
-
-def _format_value(val: str | None) -> str:
-    if val is None or str(val).strip() == "" or str(val).upper() == "NONE":
-        return "NULL"
-    return f"'{str(val).replace(chr(39), chr(39) * 2)}'"
-
-
-def upgrade() -> None:
-    """Backfill full code_pedimento_regimens data without editing old migrations."""
-
-    pedimento_desc_by_code = {code: desc for code, desc in pedimento_codes_seed}
-    required_pedimento_codes = sorted(
-        {pedimento_code for pedimento_code, _regimen_code, _type_code in code_pedimento_regimens_seed_full}
-    )
-
-    values_missing_codes = ", ".join(
-        [
-            f"({_format_value(code)}, {_format_value(pedimento_desc_by_code.get(code, f'AUTO-GENERATED FOR FK ({code})'))})"
-            for code in required_pedimento_codes
-        ]
-    )
-    op.execute(
-        f"""
-        INSERT INTO public.pedimento_codes (code, description)
-        VALUES {values_missing_codes}
-        ON CONFLICT (code) DO NOTHING;
-    """
-    )
-
-    values_relations = ", ".join(
-        [
-            f"({_format_value(pedimento_code)}, {_format_value(regimen_code)}, {_format_value(type_code)})"
-            for pedimento_code, regimen_code, type_code in code_pedimento_regimens_seed_full
-        ]
-    )
-    op.execute(
-        f"""
-        INSERT INTO public.code_pedimento_regimens (pedimento_code, regimen_code, type_code)
-        SELECT src.pedimento_code, src.regimen_code, src.type_code
-        FROM (VALUES {values_relations}) AS src(pedimento_code, regimen_code, type_code)
-        JOIN public.pedimento_codes pc
-            ON pc.code = src.pedimento_code
-        JOIN public.pedimento_regimens pr
-            ON pr.code = src.regimen_code
-        WHERE NOT EXISTS (
-            SELECT 1
-            FROM public.code_pedimento_regimens cpr
-            WHERE cpr.pedimento_code = src.pedimento_code
-              AND cpr.regimen_code = src.regimen_code
-              AND COALESCE(cpr.type_code, '') = COALESCE(src.type_code, '')
-        );
-    """
-    )
-
-
-def downgrade() -> None:
-    """Preserve seeded data on downgrade."""
-