diff --git a/.server-changes/environment-variable-value-reference-id-index.md b/.server-changes/environment-variable-value-reference-id-index.md
new file mode 100644
index 0000000000..32fee03f17
--- /dev/null
+++ b/.server-changes/environment-variable-value-reference-id-index.md
@@ -0,0 +1,6 @@
+---
+area: webapp
+type: improvement
+---
+
+Deleting or editing a secret environment variable is now fast and no longer slows down as a project accumulates variables.
diff --git a/internal-packages/database/prisma/migrations/20260810130000_add_environment_variable_value_reference_id_index/migration.sql b/internal-packages/database/prisma/migrations/20260810130000_add_environment_variable_value_reference_id_index/migration.sql
new file mode 100644
index 0000000000..c69882cbb9
--- /dev/null
+++ b/internal-packages/database/prisma/migrations/20260810130000_add_environment_variable_value_reference_id_index/migration.sql
@@ -0,0 +1,2 @@
+-- CreateIndex
+CREATE INDEX CONCURRENTLY IF NOT EXISTS "EnvironmentVariableValue_valueReferenceId_idx" ON "public"."EnvironmentVariableValue"("valueReferenceId");
diff --git a/internal-packages/database/prisma/schema.prisma b/internal-packages/database/prisma/schema.prisma
index 545b025953..8a88b9fc54 100644
--- a/internal-packages/database/prisma/schema.prisma
+++ b/internal-packages/database/prisma/schema.prisma
@@ -2067,6 +2067,7 @@ model EnvironmentVariableValue {
 
   @@unique([variableId, environmentId])
   @@index([environmentId])
+  @@index([valueReferenceId])
 }
 
 model Checkpoint {