diff --git a/package-lock.json b/package-lock.json
index c2f7466..a290763 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "groundcontrol",
-  "version": "2.3.2",
+  "version": "2.3.3",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
diff --git a/package.json b/package.json
index 9a608e3..d832ace 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "groundcontrol",
-  "version": "2.3.2",
+  "version": "2.3.3",
   "description": "GroundControl push server API",
   "devDependencies": {
     "@types/node": "18.7.16",
diff --git a/src/controller/GroundController.ts b/src/controller/GroundController.ts
index d2fe7fa..543c50b 100644
--- a/src/controller/GroundController.ts
+++ b/src/controller/GroundController.ts
@@ -104,6 +104,19 @@ const pushLogPurge = () => {
     .catch((error) => console.log("error purging PushLog:", error));
 };
 
+const purgeOldTxidSubscriptions = () => {
+  console.log("purging TokenToTxid...");
+  let today = new Date();
+  connection
+    .createQueryBuilder()
+    .delete()
+    .from(TokenToTxid)
+    .where("created <= :currentDate", { currentDate: new Date(today.getTime() - 3 * 30 * 24 * 60 * 60 * 1000) }) // 3 mo
+    .execute()
+    .then(() => console.log("TokenToTxid purged ok"))
+    .catch((error) => console.log("error purging TokenToTxid:", error));
+};
+
 const purgeIgnoredAddressesSubscriptions = () => {
   console.log("Purging addresses subscriptions...");
   connection
@@ -121,6 +134,7 @@ dataSource.initialize().then((c) => {
   connection = c;
   purgeIgnoredAddressesSubscriptions();
   pushLogPurge();
+  purgeOldTxidSubscriptions();
   setInterval(pushLogPurge, 3600 * 1000);
 });
 
diff --git a/src/entity/TokenToTxid.ts b/src/entity/TokenToTxid.ts
index 2ec855e..cf8a14f 100644
--- a/src/entity/TokenToTxid.ts
+++ b/src/entity/TokenToTxid.ts
@@ -2,6 +2,8 @@ import { Entity, PrimaryGeneratedColumn, Column, Index } from "typeorm";
 
 @Entity()
 @Index(["token", "txid"], { unique: true })
+@Index(["txid"], { unique: false })
+@Index(["created"], { unique: false })
 export class TokenToTxid {
   @PrimaryGeneratedColumn()
   id: number;