diff --git a/models/forgejo_migrations/v16c_cleanup_package_blob_indexes.go b/models/forgejo_migrations/v16c_cleanup_package_blob_indexes.go
new file mode 100644
index 0000000000..a63c2317bd
--- /dev/null
+++ b/models/forgejo_migrations/v16c_cleanup_package_blob_indexes.go
@@ -0,0 +1,31 @@
+// Copyright 2026 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package forgejo_migrations
+
+import (
+	"code.forgejo.org/xorm/xorm"
+)
+
+func init() {
+	registerMigration(&Migration{
+		Description: "cleanup extra indexes on package_blob",
+		Upgrade:     cleanupPackageBlobIndexes,
+	})
+}
+
+func cleanupPackageBlobIndexes(x *xorm.Engine) error {
+	for _, idx := range []string{
+		"IDX_package_blob_hash_blake2b",
+		"IDX_package_blob_hash_md5",
+		"IDX_package_blob_hash_sha1",
+		"IDX_package_blob_hash_sha256",
+		"IDX_package_blob_hash_sha512",
+	} {
+		err := dropIndexIfExists(x, "package_blob", idx)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
diff --git a/models/packages/package_blob.go b/models/packages/package_blob.go
index 0de4434ef8..aec8e4715b 100644
--- a/models/packages/package_blob.go
+++ b/models/packages/package_blob.go
@@ -30,11 +30,11 @@ func init() {
 type PackageBlob struct {
 	ID          int64              `xorm:"pk autoincr"`
 	Size        int64              `xorm:"NOT NULL DEFAULT 0"`
-	HashMD5     string             `xorm:"hash_md5 char(32) UNIQUE(md5) INDEX NOT NULL"`
-	HashSHA1    string             `xorm:"hash_sha1 char(40) UNIQUE(sha1) INDEX NOT NULL"`
-	HashSHA256  string             `xorm:"hash_sha256 char(64) UNIQUE(sha256) INDEX NOT NULL"`
-	HashSHA512  string             `xorm:"hash_sha512 char(128) UNIQUE(sha512) INDEX NOT NULL"`
-	HashBlake2b string             `xorm:"hash_blake2b char(128) UNIQUE(blake2b) INDEX"`
+	HashMD5     string             `xorm:"hash_md5 char(32) UNIQUE(md5) NOT NULL"`
+	HashSHA1    string             `xorm:"hash_sha1 char(40) UNIQUE(sha1) NOT NULL"`
+	HashSHA256  string             `xorm:"hash_sha256 char(64) UNIQUE(sha256) NOT NULL"`
+	HashSHA512  string             `xorm:"hash_sha512 char(128) UNIQUE(sha512) NOT NULL"`
+	HashBlake2b string             `xorm:"hash_blake2b char(128) UNIQUE(blake2b)"`
 	CreatedUnix timeutil.TimeStamp `xorm:"created INDEX NOT NULL"`
 }