diff --git a/lib/NGCP/BulkProcessor/Projects/Export/Ama/CDR.pm b/lib/NGCP/BulkProcessor/Projects/Export/Ama/CDR.pm
index 9f7fe7a..987c026 100644
--- a/lib/NGCP/BulkProcessor/Projects/Export/Ama/CDR.pm
+++ b/lib/NGCP/BulkProcessor/Projects/Export/Ama/CDR.pm
@@ -16,6 +16,7 @@ use NGCP::BulkProcessor::Projects::Export::Ama::Settings qw(
     $export_cdr_conditions
     $export_cdr_limit
     $export_cdr_stream
+    $export_cdr_rollover_fsn
 );
 
 use NGCP::BulkProcessor::Logging qw (
@@ -491,13 +492,45 @@ sub _export_cdrs_create_context {
         _error($context,"cannot get last file sequence number");
         $result = 0;
     } else {
+        my $reset = 0;
         if ($fsn < 0) {
             $fsn = 0;
+            $reset = 1;
         } elsif ($fsn >= $NGCP::BulkProcessor::Projects::Export::Ama::Format::Fields::FileSequenceNumber::max_fsn) {
-            _warn($context,"file sequence number $fsn exceeding limit (" . $NGCP::BulkProcessor::Projects::Export::Ama::Format::Fields::FileSequenceNumber::max_fsn . ")");
-            $result = 0;
+            if ($export_cdr_rollover_fsn) {
+                $fsn = 0;
+                $reset = 1;
+            } else {
+                _warn($context,"file sequence number $fsn exceeding limit (" . $NGCP::BulkProcessor::Projects::Export::Ama::Format::Fields::FileSequenceNumber::max_fsn . ")");
+                $result = 0;
+            }
+        } else {
+            _info($context,"last file sequence number is $fsn");
+        }
+        if ($reset) {
+            eval {
+                NGCP::BulkProcessor::Dao::Trunk::accounting::mark::cleanup_system_marks(undef,
+                    $export_cdr_stream,
+                );
+                NGCP::BulkProcessor::Dao::Trunk::accounting::mark::set_system_mark(undef,
+                    $export_cdr_stream,
+                    '0' #$NGCP::BulkProcessor::Projects::Export::Ama::Format::Fields::FileSequenceNumber::min_fsn
+                );
+                $fsn = NGCP::BulkProcessor::Dao::Trunk::accounting::mark::get_system_mark(undef,
+                    $export_cdr_stream
+                ); #load mark...
+            };
+            if ($@) {
+                if ($skip_errors) {
+                    _warn($context,"problem with file sequence number reset: " . $@);
+                } else {
+                    _error($context,"problem with file sequence number reset: " . $@);
+                }
+                $result = 0;
+            } else {
+                _info($context,"file sequence number reset to $fsn")
+            }
         }
-        _info($context,"last file sequence number is $fsn");
         lock $file_sequence_number;
         $file_sequence_number = $fsn;
     }
diff --git a/lib/NGCP/BulkProcessor/Projects/Export/Ama/Settings.pm b/lib/NGCP/BulkProcessor/Projects/Export/Ama/Settings.pm
index ae07a6d..a3424e8 100644
--- a/lib/NGCP/BulkProcessor/Projects/Export/Ama/Settings.pm
+++ b/lib/NGCP/BulkProcessor/Projects/Export/Ama/Settings.pm
@@ -27,7 +27,7 @@ use NGCP::BulkProcessor::LoadConfig qw(
     split_tuple
     parse_regexp
 );
-use NGCP::BulkProcessor::Utils qw(prompt timestampdigits);
+use NGCP::BulkProcessor::Utils qw(prompt timestampdigits stringtobool);
 #format_number check_ipnet
 
 require Exporter;
@@ -52,6 +52,7 @@ our @EXPORT_OK = qw(
     $export_cdr_conditions
     $export_cdr_limit
     $export_cdr_stream
+    $export_cdr_rollover_fsn
 
     $domestic_destination_pattern
     $international_destination_pattern
@@ -81,6 +82,7 @@ our $export_cdr_joins = [];
 our $export_cdr_conditions = [];
 our $export_cdr_limit = undef;
 our $export_cdr_stream = undef;
+our $export_cdr_rollover_fsn = 0;
 
 our $domestic_destination_pattern = undef;
 our $international_destination_pattern = undef;
@@ -123,6 +125,7 @@ sub update_settings {
 
         $export_cdr_limit = $data->{export_cdr_limit} if exists $data->{export_cdr_limit};
         $export_cdr_stream = $data->{export_cdr_stream} if exists $data->{export_cdr_stream};
+        $export_cdr_rollover_fsn = stringtobool($data->{export_cdr_rollover_fsn}) if exists $data->{export_cdr_rollover_fsn};
 
         #if ((confval("MAINTENANCE") // 'no') eq 'yes') {
         #        exit(0);
diff --git a/lib/NGCP/BulkProcessor/Projects/Export/Ama/settings.cfg b/lib/NGCP/BulkProcessor/Projects/Export/Ama/settings.cfg
index e9c37c4..186a977 100755
--- a/lib/NGCP/BulkProcessor/Projects/Export/Ama/settings.cfg
+++ b/lib/NGCP/BulkProcessor/Projects/Export/Ama/settings.cfg
@@ -7,5 +7,6 @@ export_cdr_joins = { 'billing.voip_subscribers source_voip_subscribers' => { 'so
 export_cdr_conditions = { 'accounting.cdr.export_status' => { '=' => '"unexported"' } }, { 'accounting.cdr.call_status' => { '=' => '"ok"' } }, { 'accounting.cdr.rating_status' => { '=' => '"ok"' } }
 export_cdr_limit = 300000
 export_cdr_stream = ama_simple
+export_cdr_rollover_fsn = 1
 
 ama_filename_format = %1$s%2$03d.debug.ama
diff --git a/lib/NGCP/BulkProcessor/Projects/Export/Ama/settings.debug.cfg b/lib/NGCP/BulkProcessor/Projects/Export/Ama/settings.debug.cfg
index 9b374a4..e815f82 100755
--- a/lib/NGCP/BulkProcessor/Projects/Export/Ama/settings.debug.cfg
+++ b/lib/NGCP/BulkProcessor/Projects/Export/Ama/settings.debug.cfg
@@ -11,5 +11,6 @@ export_cdr_stream = ama_simple
 #default
 #export_cdr_limit = 3500
 #300000
+export_cdr_rollover_fsn = 1
 
 ama_filename_format = %1$s%2$03d.debug.ama