diff --git a/.gitignore b/.gitignore
index f7357d8a..5f88f352 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,8 +27,8 @@ go.work.sum
 # env file
 .env
 config.yml
-cmd/main-migration/atlas.hcl
-cmd/satusehat-migration/atlas.hcl
+**/atlas.hcl
+!**/atlas.hcl.example
 
 # Editor/IDE
 # .idea/
diff --git a/cmd/main-migration/migrations/20251002085604.sql b/cmd/main-migration/migrations/20251002085604.sql
new file mode 100644
index 00000000..e215cd13
--- /dev/null
+++ b/cmd/main-migration/migrations/20251002085604.sql
@@ -0,0 +1,2 @@
+-- Modify "Division" table
+ALTER TABLE "public"."Division" ALTER COLUMN "Parent_Id" TYPE integer, ADD CONSTRAINT "fk_Division_Childrens" FOREIGN KEY ("Parent_Id") REFERENCES "public"."Division" ("Id") ON UPDATE NO ACTION ON DELETE NO ACTION;
diff --git a/cmd/main-migration/migrations/atlas.sum b/cmd/main-migration/migrations/atlas.sum
index 4c7a0491..dc21429b 100644
--- a/cmd/main-migration/migrations/atlas.sum
+++ b/cmd/main-migration/migrations/atlas.sum
@@ -1,4 +1,4 @@
-h1:X7LbOLpbDhciJ1O92KiWgnrVP60dDAyBKJqQKJnom+M=
+h1:kkT6c88mNI2KVSF5h2r1qdgxouqRlqt6scn0lhxl9+Q=
 20250904105930.sql h1:MEM6blCgke9DzWQSTnLzasbPIrcHssNNrJqZpSkEo6k=
 20250904141448.sql h1:J8cmYNk4ZrG9fhfbi2Z1IWz7YkfvhFqTzrLFo58BPY0=
 20250908062237.sql h1:Pu23yEW/aKkwozHoOuROvHS/GK4ngARJGdO7FB7HZuI=
@@ -20,4 +20,5 @@ h1:X7LbOLpbDhciJ1O92KiWgnrVP60dDAyBKJqQKJnom+M=
 20250929034321.sql h1:101FJ8VH12mrZWlt/X1gvKUGOhoiF8tFbjiapAjnHzg=
 20250929034428.sql h1:i+pROD9p+g5dOmmZma6WF/0Hw5g3Ha28NN85iTo1K34=
 20250930025550.sql h1:+F+CsCUXD/ql0tHGEow70GhPBX1ZybVn+bh/T4YMh7Y=
-20250930140351.sql h1:aqXw0j09+xjFqemWlo0enw3tn/IT1FMxw3oUPljkjks=
+20250930140351.sql h1:9AAEG1AnOAH+o0+oHL5G7I8vqlWOhwRlCGyyCpT/y1Q=
+20251002085604.sql h1:ml+jTtNkj5T12/loEW77jMScHbt+XAx4mN80heqo7+Q=
diff --git a/internal/domain/main-entities/division/entity.go b/internal/domain/main-entities/division/entity.go
index 7d3bc65d..5585d8a2 100644
--- a/internal/domain/main-entities/division/entity.go
+++ b/internal/domain/main-entities/division/entity.go
@@ -5,8 +5,10 @@ import (
 )
 
 type Division struct {
-	ecore.SmallMain        // adjust this according to the needs
-	Code            string `json:"code" gorm:"unique;size:10"`
-	Name            string `json:"name" gorm:"size:50"`
-	Parent_Id       *int16 `json:"parent_id"`
+	ecore.SmallMain            // adjust this according to the needs
+	Code            string     `json:"code" gorm:"unique;size:10"`
+	Name            string     `json:"name" gorm:"size:50"`
+	Parent_Id       *int16     `json:"parent_id"`
+	Parent          *Division  `gorm:"foreignKey:Parent_Id;references:Id"`
+	Childrens       []Division `gorm:"foreignKey:Parent_Id"` // may need references to self
 }