diff --git a/nexa_coa_setup/hooks.py b/nexa_coa_setup/hooks.py
index 28a12ed6..4c524c2e 100644
--- a/nexa_coa_setup/hooks.py
+++ b/nexa_coa_setup/hooks.py
@@ -39,12 +39,30 @@ def _rename_legacy_accounts(env):
 
 
 def _lock_fiscal_year_2025(env):
-    """Set fiscalyear_lock_date = 2025-12-31 on main company."""
+    """Try to set fiscalyear_lock_date = 2025-12-31 on main company.
+
+    If Odoo blocks the lock because unreconciled bank statement lines or other
+    open items exist in the period, log a clear warning and continue. The user
+    can set the lock manually via Accounting > Configuration > Settings > Lock
+    Dates once those items are cleaned up.
+    """
     from datetime import date
+    from odoo.exceptions import RedirectWarning, UserError, ValidationError
     company = env.ref("base.main_company", raise_if_not_found=False)
     if not company:
         return
     target = date(2025, 12, 31)
-    if not company.fiscalyear_lock_date or company.fiscalyear_lock_date < target:
+    if company.fiscalyear_lock_date and company.fiscalyear_lock_date >= target:
+        _logger.info("nexa_coa_setup: fiscalyear_lock_date already at or after 2025-12-31")
+        return
+    try:
         company.fiscalyear_lock_date = target
         _logger.info("nexa_coa_setup: fiscalyear_lock_date set to 2025-12-31")
+    except (RedirectWarning, UserError, ValidationError) as exc:
+        _logger.warning(
+            "nexa_coa_setup: could not auto-lock fiscal year 2025-12-31. "
+            "Reason: %s. Set the lock manually via Accounting > Configuration > "
+            "Settings > Lock Dates after the unreconciled items in the period "
+            "are cleaned up.",
+            exc,
+        )