diff --git a/internal/logs/logs.go b/internal/logs/logs.go
index 893be7006..535802a20 100644
--- a/internal/logs/logs.go
+++ b/internal/logs/logs.go
@@ -164,11 +164,9 @@ const (
 	EventNotaryParserNotSet                                              = "notary parser not set"
 	EventCouldNotParseNotaryEvent                                        = "could not parse notary event"
 	EventNotaryHandlersForParsedNotificationEventWereNotRegistered       = "notary handlers for parsed notification event were not registered"
-	EventListenerHasBeenAlreadyStartedIgnoreParser                       = "listener has been already started, ignore parser"
 	EventRegisteredNewEventParser                                        = "registered new event parser"
 	EventIgnoreHandlerOfEventWoParser                                    = "ignore handler of event w/o parser"
 	EventRegisteredNewEventHandler                                       = "registered new event handler"
-	EventListenerHasBeenAlreadyStartedIgnoreNotaryParser                 = "listener has been already started, ignore notary parser"
 	EventIgnoreHandlerOfNotaryEventWoParser                              = "ignore handler of notary event w/o parser"
 	StorageOperation                                                     = "local object storage operation"
 	BlobovniczaCreatingDirectoryForBoltDB                                = "creating directory for BoltDB"
diff --git a/pkg/morph/event/listener.go b/pkg/morph/event/listener.go
index b67546804..64ff205be 100644
--- a/pkg/morph/event/listener.go
+++ b/pkg/morph/event/listener.go
@@ -100,8 +100,6 @@ type listener struct {
 
 	startOnce, stopOnce sync.Once
 
-	started bool
-
 	notificationParsers  map[scriptHashWithType]NotificationParser
 	notificationHandlers map[scriptHashWithType][]Handler
 
@@ -171,9 +169,6 @@ func (l *listener) ListenWithError(ctx context.Context, intError chan<- error) {
 }
 
 func (l *listener) listen(ctx context.Context, intError chan<- error) error {
-	// mark listener as started
-	l.started = true
-
 	subErrCh := make(chan error)
 
 	go l.subscribe(subErrCh)
@@ -462,12 +457,6 @@ func (l *listener) SetNotificationParser(pi NotificationParserInfo) {
 	l.mtx.Lock()
 	defer l.mtx.Unlock()
 
-	// check if the listener was started
-	if l.started {
-		log.Warn(context.Background(), logs.EventListenerHasBeenAlreadyStartedIgnoreParser)
-		return
-	}
-
 	// add event parser
 	if _, ok := l.notificationParsers[pi.scriptHashWithType]; !ok {
 		l.notificationParsers[pi.scriptHashWithType] = pi.parser()
@@ -546,12 +535,6 @@ func (l *listener) SetNotaryParser(pi NotaryParserInfo) {
 	l.mtx.Lock()
 	defer l.mtx.Unlock()
 
-	// check if the listener was started
-	if l.started {
-		log.Warn(context.Background(), logs.EventListenerHasBeenAlreadyStartedIgnoreNotaryParser)
-		return
-	}
-
 	// add event parser
 	if _, ok := l.notaryParsers[pi.notaryRequestTypes]; !ok {
 		l.notaryParsers[pi.notaryRequestTypes] = pi.parser()