diff --git a/internal/repository/lms_reorder.go b/internal/repository/lms_reorder.go
index 8093f89..8730217 100644
--- a/internal/repository/lms_reorder.go
+++ b/internal/repository/lms_reorder.go
@@ -6,12 +6,21 @@ import (
 )
 
 // ReorderPrograms sets sort_order to 1..n in the given order (transactional).
+// Uses an intermediate bump so UNIQUE (sort_order) is never violated mid-reorder.
 func (s *Store) ReorderPrograms(ctx context.Context, orderedIDs []int64) error {
 	tx, err := s.conn.Begin(ctx)
 	if err != nil {
 		return err
 	}
 	defer func() { _ = tx.Rollback(ctx) }()
+
+	if _, err := tx.Exec(ctx, `
+UPDATE programs
+SET sort_order = sort_order + $1,
+    updated_at = CURRENT_TIMESTAMP`, lessonReorderSortBump); err != nil {
+		return err
+	}
+
 	for i, id := range orderedIDs {
 		tag, err := tx.Exec(ctx, `UPDATE programs SET sort_order = $1, updated_at = CURRENT_TIMESTAMP WHERE id = $2`, int32(i+1), id)
 		if err != nil {
@@ -25,12 +34,22 @@ func (s *Store) ReorderPrograms(ctx context.Context, orderedIDs []int64) error {
 }
 
 // ReorderCoursesInProgram sets sort_order for courses under programID (transactional).
+// Uses an intermediate bump so UNIQUE (program_id, sort_order) is never violated mid-reorder.
 func (s *Store) ReorderCoursesInProgram(ctx context.Context, programID int64, orderedIDs []int64) error {
 	tx, err := s.conn.Begin(ctx)
 	if err != nil {
 		return err
 	}
 	defer func() { _ = tx.Rollback(ctx) }()
+
+	if _, err := tx.Exec(ctx, `
+UPDATE courses
+SET sort_order = sort_order + $1,
+    updated_at = CURRENT_TIMESTAMP
+WHERE program_id = $2`, lessonReorderSortBump, programID); err != nil {
+		return err
+	}
+
 	for i, id := range orderedIDs {
 		tag, err := tx.Exec(ctx, `
 UPDATE courses
@@ -49,12 +68,22 @@ WHERE id = $2
 }
 
 // ReorderModulesInCourse sets sort_order for modules under courseID (transactional).
+// Uses an intermediate bump so UNIQUE (course_id, sort_order) is never violated mid-reorder.
 func (s *Store) ReorderModulesInCourse(ctx context.Context, courseID int64, orderedIDs []int64) error {
 	tx, err := s.conn.Begin(ctx)
 	if err != nil {
 		return err
 	}
 	defer func() { _ = tx.Rollback(ctx) }()
+
+	if _, err := tx.Exec(ctx, `
+UPDATE modules
+SET sort_order = sort_order + $1,
+    updated_at = CURRENT_TIMESTAMP
+WHERE course_id = $2`, lessonReorderSortBump, courseID); err != nil {
+		return err
+	}
+
 	for i, id := range orderedIDs {
 		tag, err := tx.Exec(ctx, `
 UPDATE modules