diff --git a/packages/indexer-agent/src/db/migrations/12-remove-not-null-constraint-from-protocol-network-column.ts b/packages/indexer-agent/src/db/migrations/12-remove-not-null-constraint-from-protocol-network-column.ts
deleted file mode 100644
index 920ed7211..000000000
--- a/packages/indexer-agent/src/db/migrations/12-remove-not-null-constraint-from-protocol-network-column.ts
+++ /dev/null
@@ -1,84 +0,0 @@
-import { Logger } from '@graphprotocol/common-ts'
-import { QueryTypes, QueryInterface } from 'sequelize'
-
-interface MigrationContext {
-  queryInterface: QueryInterface
-  logger: Logger
-}
-
-interface Context {
-  context: MigrationContext
-}
-
-const UNIQUE_INDEX_NAME = 'idx_unique_identifier_and_protocol_network'
-
-export async function up({ context }: Context): Promise<void> {
-  const { queryInterface } = context
-
-  const primaryKeyName = await getPrimaryKeyName(queryInterface)
-  await alterTable(primaryKeyName, queryInterface)
-}
-
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
-export async function down({ context }: Context): Promise<void> {
-  /* TODO
-  - Drop partial unique index on IndexingRules (identifier)
-  - Infer the name and drop the unique constraint from (identifier, protocolNetwork)
-  - Add NOT NULL back to protocolNetwork, possibly removing rows where it's NULL
-  - Infer the name and drop primary key on id
-  - Create a primary key on (identifier, protocolNetwork)
-   */
-}
-
-async function getPrimaryKeyName(
-  queryInterface: QueryInterface,
-): Promise<string> {
-  const sql = `
-SELECT
-    conname
-FROM
-    pg_constraint
-    INNER JOIN pg_class ON pg_constraint.conrelid = pg_class.oid
-    INNER JOIN pg_namespace ON pg_namespace.oid = pg_class.relnamespace
-WHERE
-    pg_class.relname = 'IndexingRules'
-    AND pg_namespace.nspname = 'public'
-    AND pg_constraint.contype = 'p';
-`
-  const result: null | { conname?: string } =
-    await queryInterface.sequelize.query(sql, {
-      type: QueryTypes.SELECT,
-      raw: true,
-      plain: true,
-    })
-
-  if (!result || !result.conname) {
-    throw new Error(
-      `Failed to infer primary key constraint name for the 'IndexingRules' table.`,
-    )
-  }
-  return result.conname
-}
-
-async function alterTable(
-  primaryKey: string,
-  queryInterface: QueryInterface,
-): Promise<void> {
-  const alterTableSql = `
-ALTER TABLE "IndexingRules"
-    DROP CONSTRAINT "${primaryKey}",
-    ADD PRIMARY KEY (id),
-    ALTER COLUMN "protocolNetwork" DROP NOT NULL,
-    ADD UNIQUE ("identifier", "protocolNetwork");
-`
-
-  // We still need this partial index to enforce "identifier" uniqueness when
-  // "protocolNetwork" is null.
-  const createUniqueIndexSql = `
-CREATE UNIQUE INDEX ${UNIQUE_INDEX_NAME} ON "IndexingRules" ("identifier")
-WHERE
-    "protocolNetwork" IS NULL;
-`
-  await queryInterface.sequelize.query(alterTableSql)
-  await queryInterface.sequelize.query(createUniqueIndexSql)
-}