diff --git a/backend/src/api/database-migration.ts b/backend/src/api/database-migration.ts
index 299cd309b..4bb356748 100644
--- a/backend/src/api/database-migration.ts
+++ b/backend/src/api/database-migration.ts
@@ -7,7 +7,7 @@ import cpfpRepository from '../repositories/CpfpRepository';
 import { RowDataPacket } from 'mysql2';
 
 class DatabaseMigration {
-  private static currentVersion = 96;
+  private static currentVersion = 97;
   private queryTimeout = 3600_000;
   private statisticsAddedIndexed = false;
   private uniqueLogs: string[] = [];
@@ -1135,6 +1135,12 @@ class DatabaseMigration {
       await this.$executeQuery(`ALTER TABLE blocks_audits MODIFY time timestamp NOT NULL DEFAULT 0`);
       await this.updateToSchemaVersion(96);
     }
+
+    if (databaseSchemaVersion < 97) {
+      await this.$executeQuery('ALTER TABLE blocks DROP FOREIGN KEY IF EXISTS `blocks_ibfk_1`');
+      await this.$executeQuery('ALTER TABLE blocks ADD FOREIGN KEY (`pool_id`) REFERENCES `pools` (`id`) ON DELETE CASCADE');
+      await this.updateToSchemaVersion(97);
+    }
   }
 
   /**
diff --git a/backend/src/api/pools-parser.ts b/backend/src/api/pools-parser.ts
index 2895da5a5..9e9e4f22f 100644
--- a/backend/src/api/pools-parser.ts
+++ b/backend/src/api/pools-parser.ts
@@ -45,6 +45,12 @@ class PoolsParser {
     let reindexUnknown = false;
     let clearCache = false;
 
+    const poolsDict: { [key: string]: PoolTag } = {};
+    for (const pool of this.miningPools) {
+      poolsDict[pool.id] = pool;
+    }
+    const dbPools = await PoolsRepository.$getPools();
+    const dbPoolsDict: { [key: string]: PoolTag } = {};
 
     for (const pool of this.miningPools) {
       if (!pool.id) {
@@ -74,7 +80,7 @@ class PoolsParser {
         logger.warn(`Mining pool ${pool.name} has no 'regexes' defined.`);
       }
 
-      const poolDB = await PoolsRepository.$getPoolByUniqueId(pool.id, false);
+      const poolDB = dbPoolsDict[pool.id];
       if (!poolDB) {
         // New mining pool
         const slug = pool.name.replace(/[^a-z0-9]/gi, '').toLowerCase();
@@ -108,6 +114,15 @@ class PoolsParser {
       }
     }
 
+    for (const pool of dbPools) {
+      if (!poolsDict[pool.id]) {
+        logger.notice(`Removing ${pool.name} mining pool from database.`);
+        await PoolsRepository.$deleteMiningPool(pool.id);
+        reindexUnknown = true;
+        clearCache = true;
+      }
+    }
+
     if (reindexUnknown) {
       logger.notice(`Updating addresses and/or coinbase tags for unknown mining pool.`);
       let unknownPool;
diff --git a/backend/src/repositories/PoolsRepository.ts b/backend/src/repositories/PoolsRepository.ts
index eda792bb3..fad64934e 100644
--- a/backend/src/repositories/PoolsRepository.ts
+++ b/backend/src/repositories/PoolsRepository.ts
@@ -162,6 +162,35 @@ class PoolsRepository {
     }
   }
 
+  /**
+   * Delete a mining pool from the database
+   * 
+   * @param poolId 
+   */
+  public async $deleteMiningPool(poolId: number): Promise<void> {
+    try {
+      const unknownPool = await this.$getUnknownPool();
+      if (!unknownPool) {
+        throw new Error('Cannot find Unknown pool');
+      }
+
+      await DB.query(`
+        UPDATE blocks
+        SET pool_id = ?
+        WHERE pool_id = ?`,
+        [unknownPool.id, poolId]
+      );
+
+      await DB.query(`
+        DELETE FROM pools
+        WHERE id = ?`,
+        [poolId]
+      );
+    } catch (e: any) {
+      logger.err(`Cannot delete mining pool id ${poolId}. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+  }
+
   /**
    * Rename an existing mining pool
    *