diff --git a/backend-pg/src/db/migrations/20231218103423_secret.ts b/backend-pg/src/db/migrations/20231218103423_secret.ts
index a29dccfc8..b017c5d9f 100644
--- a/backend-pg/src/db/migrations/20231218103423_secret.ts
+++ b/backend-pg/src/db/migrations/20231218103423_secret.ts
@@ -27,7 +27,7 @@ export async function up(knex: Knex): Promise<void> {
       // t.text("secretKeyHash").notNullable();
       // t.text("secretValueHash");
       // t.text("secretCommentHash");
-      t.text("secretBlindIndex").notNullable();
+      t.text("secretBlindIndex");
       t.text("secretKeyCiphertext").notNullable();
       t.text("secretKeyIV").notNullable();
       t.text("secretKeyTag").notNullable();
diff --git a/backend-pg/src/db/migrations/20231220052508_secret-version.ts b/backend-pg/src/db/migrations/20231220052508_secret-version.ts
index 6e3a8ae93..0bcee295b 100644
--- a/backend-pg/src/db/migrations/20231220052508_secret-version.ts
+++ b/backend-pg/src/db/migrations/20231220052508_secret-version.ts
@@ -9,7 +9,7 @@ export async function up(knex: Knex): Promise<void> {
       t.uuid("id", { primaryKey: true }).defaultTo(knex.fn.uuid());
       t.integer("version").defaultTo(1).notNullable();
       t.string("type").notNullable().defaultTo(SecretType.Shared);
-      t.text("secretBlindIndex").notNullable();
+      t.text("secretBlindIndex");
       t.text("secretKeyCiphertext").notNullable();
       t.text("secretKeyIV").notNullable();
       t.text("secretKeyTag").notNullable();
diff --git a/backend-pg/src/db/migrations/20240101104907_secret-approval-request.ts b/backend-pg/src/db/migrations/20240101104907_secret-approval-request.ts
index 98bfb163b..21a9e944e 100644
--- a/backend-pg/src/db/migrations/20240101104907_secret-approval-request.ts
+++ b/backend-pg/src/db/migrations/20240101104907_secret-approval-request.ts
@@ -54,7 +54,7 @@ export async function up(knex: Knex): Promise<void> {
       // everything related  to secret
       t.uuid("id", { primaryKey: true }).defaultTo(knex.fn.uuid());
       t.integer("version").defaultTo(1);
-      t.text("secretBlindIndex").notNullable();
+      t.text("secretBlindIndex");
       t.text("secretKeyCiphertext").notNullable();
       t.text("secretKeyIV").notNullable();
       t.text("secretKeyTag").notNullable();
diff --git a/pg-migrator/src/migrations/20231220052508_secret-version.ts b/pg-migrator/src/migrations/20231220052508_secret-version.ts
index 6e3a8ae93..0bcee295b 100644
--- a/pg-migrator/src/migrations/20231220052508_secret-version.ts
+++ b/pg-migrator/src/migrations/20231220052508_secret-version.ts
@@ -9,7 +9,7 @@ export async function up(knex: Knex): Promise<void> {
       t.uuid("id", { primaryKey: true }).defaultTo(knex.fn.uuid());
       t.integer("version").defaultTo(1).notNullable();
       t.string("type").notNullable().defaultTo(SecretType.Shared);
-      t.text("secretBlindIndex").notNullable();
+      t.text("secretBlindIndex");
       t.text("secretKeyCiphertext").notNullable();
       t.text("secretKeyIV").notNullable();
       t.text("secretKeyTag").notNullable();
diff --git a/pg-migrator/src/migrations/20240101104907_secret-approval-request.ts b/pg-migrator/src/migrations/20240101104907_secret-approval-request.ts
index 98bfb163b..21a9e944e 100644
--- a/pg-migrator/src/migrations/20240101104907_secret-approval-request.ts
+++ b/pg-migrator/src/migrations/20240101104907_secret-approval-request.ts
@@ -54,7 +54,7 @@ export async function up(knex: Knex): Promise<void> {
       // everything related  to secret
       t.uuid("id", { primaryKey: true }).defaultTo(knex.fn.uuid());
       t.integer("version").defaultTo(1);
-      t.text("secretBlindIndex").notNullable();
+      t.text("secretBlindIndex");
       t.text("secretKeyCiphertext").notNullable();
       t.text("secretKeyIV").notNullable();
       t.text("secretKeyTag").notNullable();