diff --git a/lib/Command/Stun/Add.php b/lib/Command/Stun/Add.php
index 9c47eb31bb5..2e7bbaba871 100644
--- a/lib/Command/Stun/Add.php
+++ b/lib/Command/Stun/Add.php
@@ -50,6 +50,14 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 			$servers = [];
 		}
 
+		// check if the server is already in the list
+		foreach ($servers as $existingServer) {
+			if ($existingServer === "$host:$port") {
+				$output->writeln('<error>Server already exists.</error>');
+				return 1;
+			}
+		}
+
 		$servers[] = "$host:$port";
 
 		$this->config->setAppValue('spreed', 'stun_servers', json_encode($servers));
diff --git a/lib/Command/Turn/Add.php b/lib/Command/Turn/Add.php
index 7bae8645c62..6cec353d369 100644
--- a/lib/Command/Turn/Add.php
+++ b/lib/Command/Turn/Add.php
@@ -98,6 +98,19 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 			$servers = [];
 		}
 
+		//Checking if the server is already added
+		foreach ($servers as $existingServer) {
+			if (
+				$existingServer['schemes'] === $schemes &&
+				$existingServer['server'] === $server &&
+				$existingServer['protocols'] === $protocols
+			) {
+				$output->writeln('<error>Server already exists with the same configuration.</error>');
+				return 1;
+			}
+		}
+
+
 		$servers[] = [
 			'schemes' => $schemes,
 			'server' => $server,
diff --git a/tests/php/Command/Stun/AddTest.php b/tests/php/Command/Stun/AddTest.php
index 2ae34c4442b..28cfd9e2533 100644
--- a/tests/php/Command/Stun/AddTest.php
+++ b/tests/php/Command/Stun/AddTest.php
@@ -85,4 +85,20 @@ public function testAddServerToNonEmptyList(): void {
 
 		self::invokePrivate($this->command, 'execute', [$this->input, $this->output]);
 	}
+
+	public function testAddDuplicateServer(): void {
+		$this->input->method('getArgument')
+			->with('server')
+			->willReturn('stun.test.com:443');
+		$this->config->method('getAppValue')
+			->with('spreed', 'stun_servers')
+			->willReturn(json_encode(['stun.test.com:443']));
+		$this->config->expects($this->never())
+			->method('setAppValue');
+		$this->output->expects($this->once())
+			->method('writeln')
+			->with($this->equalTo('<error>Server already exists.</error>'));
+	
+		$this->assertSame(1, self::invokePrivate($this->command, 'execute', [$this->input, $this->output]));
+	}
 }
diff --git a/tests/php/Command/Turn/AddTest.php b/tests/php/Command/Turn/AddTest.php
index c9aed706ad9..31e531964e7 100644
--- a/tests/php/Command/Turn/AddTest.php
+++ b/tests/php/Command/Turn/AddTest.php
@@ -304,6 +304,7 @@ public function testAddServerToNonEmptyList(): void {
 			->with('spreed', 'turn_servers')
 			->willReturn(json_encode([
 				[
+					'schemes' => 'turn',
 					'server' => 'turn1.test.com',
 					'secret' => 'my-test-secret-1',
 					'protocols' => 'udp,tcp'
@@ -316,6 +317,7 @@ public function testAddServerToNonEmptyList(): void {
 				$this->equalTo('turn_servers'),
 				$this->equalTo(json_encode([
 					[
+						'schemes' => 'turn',
 						'server' => 'turn1.test.com',
 						'secret' => 'my-test-secret-1',
 						'protocols' => 'udp,tcp'
@@ -376,4 +378,43 @@ public function testServerSanitization(): void {
 
 		self::invokePrivate($this->command, 'execute', [$this->input, $this->output]);
 	}
+	
+	public function testAddDuplicateServer(): void {
+		$this->input->method('getArgument')
+			->willReturnCallback(function ($arg) {
+				if ($arg === 'schemes') {
+					return 'turn,turns';
+				} elseif ($arg === 'server') {
+					return 'turn.test.com';
+				} elseif ($arg === 'protocols') {
+					return 'udp,tcp';
+				}
+				throw new \Exception();
+			});
+		$this->input->method('getOption')
+			->willReturnCallback(function ($arg) {
+				if ($arg === 'secret') {
+					return 'my-test-secret';
+				} elseif ($arg === 'generate-secret') {
+					return false;
+				}
+				throw new \Exception();
+			});
+		$this->config->method('getAppValue')
+			->with('spreed', 'turn_servers')
+			->willReturn(json_encode([[
+				'schemes' => 'turn,turns',
+				'server' => 'turn.test.com',
+				'secret' => 'my-test-secret',
+				'protocols' => 'udp,tcp'
+			]]));
+		$this->config->expects($this->never())
+			->method('setAppValue');
+		$this->output->expects($this->once())
+			->method('writeln')
+			->with($this->equalTo('<error>Server already exists with the same configuration.</error>'));
+	
+		$this->assertSame(1, self::invokePrivate($this->command, 'execute', [$this->input, $this->output]));
+	}
+
 }