diff --git a/node/log_entry_sync/src/sync_manager/config.rs b/node/log_entry_sync/src/sync_manager/config.rs
index 15d540c..d9d281f 100644
--- a/node/log_entry_sync/src/sync_manager/config.rs
+++ b/node/log_entry_sync/src/sync_manager/config.rs
@@ -32,6 +32,8 @@ pub struct LogSyncConfig {
     pub remove_finalized_block_interval_minutes: u64,
     // watch_loop (eth_getLogs) trigger interval
     pub watch_loop_wait_time_ms: u64,
+    // force to sync log from start block number
+    pub force_log_sync_from_start_block_number: bool,
 }
 
 #[derive(Clone)]
@@ -58,6 +60,7 @@ impl LogSyncConfig {
         default_finalized_block_count: u64,
         remove_finalized_block_interval_minutes: u64,
         watch_loop_wait_time_ms: u64,
+        force_log_sync_from_start_block_number: bool,
     ) -> Self {
         Self {
             rpc_endpoint_url,
@@ -73,6 +76,7 @@ impl LogSyncConfig {
             default_finalized_block_count,
             remove_finalized_block_interval_minutes,
             watch_loop_wait_time_ms,
+            force_log_sync_from_start_block_number,
         }
     }
 }
diff --git a/node/log_entry_sync/src/sync_manager/mod.rs b/node/log_entry_sync/src/sync_manager/mod.rs
index 401462f..f85d7d7 100644
--- a/node/log_entry_sync/src/sync_manager/mod.rs
+++ b/node/log_entry_sync/src/sync_manager/mod.rs
@@ -102,7 +102,14 @@ impl LogSyncManager {
                         block_hash_cache,
                     };
 
-                    let (mut start_block_number, mut start_block_hash) =
+                    let (mut start_block_number, mut start_block_hash) = if log_sync_manager
+                        .config
+                        .force_log_sync_from_start_block_number
+                    {
+                        let block_number = log_sync_manager.config.start_block_number;
+                        let block_hash = log_sync_manager.get_block(block_number.into()).await?.1;
+                        (block_number, block_hash)
+                    } else {
                         match log_sync_manager.store.get_sync_progress()? {
                             // No previous progress, so just use config.
                             None => {
@@ -112,7 +119,8 @@ impl LogSyncManager {
                                 (block_number, block_hash)
                             }
                             Some((block_number, block_hash)) => (block_number, block_hash),
-                        };
+                        }
+                    };
 
                     let (mut finalized_block_number, mut finalized_block_hash) =
                         match log_sync_manager.get_block(BlockNumber::Finalized).await {
diff --git a/node/src/config/convert.rs b/node/src/config/convert.rs
index 450fbd0..58c0152 100644
--- a/node/src/config/convert.rs
+++ b/node/src/config/convert.rs
@@ -156,6 +156,7 @@ impl ZgsConfig {
             self.default_finalized_block_count,
             self.remove_finalized_block_interval_minutes,
             self.watch_loop_wait_time_ms,
+            self.force_log_sync_from_start_block_number,
         ))
     }
 
diff --git a/node/src/config/mod.rs b/node/src/config/mod.rs
index ff6ab1c..e5d2bf1 100644
--- a/node/src/config/mod.rs
+++ b/node/src/config/mod.rs
@@ -33,6 +33,7 @@ build_config! {
     (blockchain_rpc_endpoint, (String), "http://127.0.0.1:8545".to_string())
     (log_contract_address, (String), "".to_string())
     (log_sync_start_block_number, (u64), 0)
+    (force_log_sync_from_start_block_number, (bool), false)
     (confirmation_block_count, (u64), 12)
     (log_page_size, (u64), 999)
     (max_cache_data_size, (usize), 100 * 1024 * 1024) // 100 MB