[fix] blockchain: remove fork_blocks only if not already removed

lib/modules/blockchain/bc-db-writer/src/blocks.rs

@@ -78,9 +78,14 @@ pub fn insert_new_head_block(
         // Remove too old blocks
         for blockstamp in removed_blockstamps {
             let blockstamp_bytes: Vec<u8> = blockstamp.into();
+            if fork_blocks_store
+                .get(w.as_ref(), &blockstamp_bytes)?
+                .is_some()
+            {
                 fork_blocks_store.delete(w.as_mut(), &blockstamp_bytes)?;
             }
         }
+    }
     Ok(())
 }
 

lib/modules/blockchain/bc-db-writer/src/blocks/fork_tree.rs

@@ -87,8 +87,13 @@ pub fn change_main_branch(
     let fork_blocks_store = db.get_store(FORK_BLOCKS);
     for blockstamp in removed_blockstamps {
         let blockstamp_bytes: Vec<u8> = blockstamp.into();
+        if fork_blocks_store
+            .get(w.as_ref(), &blockstamp_bytes)?
+            .is_some()
+        {
             fork_blocks_store.delete(w.as_mut(), &blockstamp_bytes)?;
         }
+    }
     Ok(())
 }