diff --git a/src/currency_core/blockchain_storage.cpp b/src/currency_core/blockchain_storage.cpp
index 3db594ca..f88d60c6 100644
--- a/src/currency_core/blockchain_storage.cpp
+++ b/src/currency_core/blockchain_storage.cpp
@@ -2213,31 +2213,6 @@ bool blockchain_storage::is_multisig_output_spent(const crypto::hash& multisig_i
   return source_tx_ptr->m_spent_flags[ms_out_index];
 }
 //------------------------------------------------------------------
-// bool blockchain_storage::resync_spent_tx_flags()
-// {
-//   LOG_PRINT_L0("Started re-building spent tx outputs data...");
-//   CRITICAL_REGION_LOCAL(m_blockchain_lock);
-//   for(auto& tx: m_db_transactions)
-//   {
-//     if(is_coinbase(tx.second.tx))
-//       continue;
-// 
-//     for(auto& in: tx.second.tx.vin)
-//     {      
-//       CHECKED_GET_SPECIFIC_VARIANT(in, txin_to_key, in_to_key, false);
-//       if(in_to_key.key_offsets.size() != 1)
-//         continue;
-// 
-//       //direct spending
-//       if(!update_spent_tx_flags_for_input(in_to_key.amount, in_to_key.key_offsets[0], true))
-//         return false;
-// 
-//     }
-//   }
-//   LOG_PRINT_L0("Finished re-building spent tx outputs data");
-//   return true;
-// }
-//------------------------------------------------------------------
 bool blockchain_storage::find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, uint64_t& starter_offset)const
 {
   CRITICAL_REGION_LOCAL(m_read_lock);
diff --git a/src/currency_protocol/currency_protocol_handler.inl b/src/currency_protocol/currency_protocol_handler.inl
index b281e5c3..e4eebf74 100644
--- a/src/currency_protocol/currency_protocol_handler.inl
+++ b/src/currency_protocol/currency_protocol_handler.inl
@@ -258,6 +258,11 @@ namespace currency
     }
     
     //pre-validate block here, and propagate it to network asap to avoid latency of handling big block (tx flood)
+    //########################################################
+    /*
+    problem with prevalidation: in case of pre_validate_block() is passed but handle_incoming_tx() is failed
+    network got spammed with notifications about this broken block and then connections got closed.
+    temporary disabled to more investigation
     bool prevalidate_relayed = false; 
     if (m_core.pre_validate_block(b, bvc, block_id) && bvc.m_added_to_main_chain)
     {
@@ -266,6 +271,8 @@ namespace currency
       relay_block(arg, context);
       prevalidate_relayed = true;
     }
+    */
+    //########################################################
 
     //now actually process block
     for(auto tx_blob_it = arg.b.txs.begin(); tx_blob_it!=arg.b.txs.end();tx_blob_it++)
@@ -291,13 +298,13 @@ namespace currency
     }
     LOG_PRINT_GREEN("[HANDLE]NOTIFY_NEW_BLOCK EXTRA: id: " << block_id 
       << ",bvc.m_added_to_main_chain " << bvc.m_added_to_main_chain
-      << ",prevalidate_result " << prevalidate_relayed
+      //<< ",prevalidate_result " << prevalidate_relayed
       << ",bvc.added_to_altchain " << bvc.added_to_altchain
       << ",bvc.m_marked_as_orphaned " << bvc.m_marked_as_orphaned, LOG_LEVEL_2);
 
     if (bvc.m_added_to_main_chain || (bvc.added_to_altchain && bvc.height_difference < 2))
     { 
-      if (!prevalidate_relayed)
+      if (true/*!prevalidate_relayed*/)
       {
         // pre-validation failed prevoiusly, but complete check was success, not an alternative block
         ++arg.hop;
diff --git a/src/version.h.in b/src/version.h.in
index 8522d942..e523598c 100644
--- a/src/version.h.in
+++ b/src/version.h.in
@@ -2,6 +2,6 @@
 
 #define BUILD_COMMIT_ID "@VERSION@"
 #define PROJECT_VERSION "1.0"
-#define PROJECT_VERSION_BUILD_NO 28
+#define PROJECT_VERSION_BUILD_NO 29
 #define PROJECT_VERSION_BUILD_NO_STR STRINGIFY_EXPAND(PROJECT_VERSION_BUILD_NO)
 #define PROJECT_VERSION_LONG PROJECT_VERSION "." PROJECT_VERSION_BUILD_NO_STR "[" BUILD_COMMIT_ID "]"