diff --git a/docs/cbp_state_machine.puml b/docs/cbp_state_machine.puml
index 51f0de48..84208066 100644
--- a/docs/cbp_state_machine.puml
+++ b/docs/cbp_state_machine.puml
@@ -55,9 +55,13 @@ validate -[#blue]-> stopped : Sync was stopped.
 
 scan : ScanAction
 scan -[#green,bold]-> clearAlreadyScannedBlocks
+scan -[#red]-> failed : Error occured.
+scan -[#blue]-> stopped : Sync was stopped.
 
 clearAlreadyScannedBlocks : ClearAlreadyScannedBlocksAction
 clearAlreadyScannedBlocks -[#green,bold]-> enhance
+clearAlreadyScannedBlocks -[#red]-> failed : Error occured.
+clearAlreadyScannedBlocks -[#blue]-> stopped : Sync was stopped.
 
 enhance : EnhanceAction
 enhance -[#green,bold]-> download : Not all blocks in the\nsync range are downloaded\nand scanned yet.
diff --git a/docs/images/cbp_state_machine.png b/docs/images/cbp_state_machine.png
index 68696ab0..28b1c7b3 100644
Binary files a/docs/images/cbp_state_machine.png and b/docs/images/cbp_state_machine.png differ