diff --git a/php/inc_fx_static_sync.php b/php/inc_fx_static_sync.php
index bdddf69..d1c7459 100644
--- a/php/inc_fx_static_sync.php
+++ b/php/inc_fx_static_sync.php
@@ -217,26 +217,44 @@ function fxStaticSyncGetTableRowCount($objDb, $strTable) {
     return (int)$objDb->fxGetVar('SELECT COUNT(*) FROM `' . $strTable . '`');
 }
 
+function fxStaticSyncKeyColumnsValid($objDb, $strTable, array $tabKeys) {
+    if (count($tabKeys) === 0) {
+        return false;
+    }
+
+    $tabCols = fxStaticSyncGetTableColumnNames($objDb, $strTable);
+    foreach ($tabKeys as $strCol) {
+        if (!in_array($strCol, $tabCols, true)) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
 /**
- * Charge les lignes ordonnées par clé métier — une entrée par clé (dernière gagne, ordre stable).
+ * Charge les lignes — une entrée par clé métier (dernière gagne, ordre stable si ORDER BY possible).
  */
 function fxStaticSyncFetchRowsByKey($objDb, array $tabDef) {
     $strTable = $tabDef['table'];
     $tabKeys = $tabDef['keys'];
 
     if (!fxStaticSyncTableExists($objDb, $strTable)) {
-        return array('rows' => array(), 'duplicate_count' => 0, 'physical_count' => 0);
+        return array('rows' => array(), 'duplicate_count' => 0, 'physical_count' => 0, 'error' => null);
     }
 
-    $strOrder = fxStaticSyncSqlOrderByKeys($tabKeys);
-    $sql = 'SELECT * FROM `' . $strTable . '` ORDER BY ' . $strOrder;
+    if (!fxStaticSyncKeyColumnsValid($objDb, $strTable, $tabKeys)) {
+        return array('rows' => array(), 'duplicate_count' => 0, 'physical_count' => 0, 'error' => 'bad_keys');
+    }
+
+    $sql = 'SELECT * FROM `' . $strTable . '` ORDER BY ' . fxStaticSyncSqlOrderByKeys($tabKeys);
     $tabResults = $objDb->fxGetResults($sql);
     $tabKeyed = array();
     $intDupes = 0;
     $intPhysical = 0;
 
     if (!is_array($tabResults)) {
-        return array('rows' => array(), 'duplicate_count' => 0, 'physical_count' => 0);
+        return array('rows' => array(), 'duplicate_count' => 0, 'physical_count' => 0, 'error' => 'query_failed');
     }
 
     foreach ($tabResults as $row) {
@@ -255,6 +273,7 @@ function fxStaticSyncFetchRowsByKey($objDb, array $tabDef) {
         'rows' => $tabKeyed,
         'duplicate_count' => $intDupes,
         'physical_count' => $intPhysical,
+        'error' => null,
     );
 }
 
@@ -279,6 +298,12 @@ function fxStaticSyncLoadKeyedRows($objDb, array $tabDef, array $tabCompareCols
     }
 
     $tabFetch = fxStaticSyncFetchRowsByKey($objDb, $tabDef);
+    if ($tabFetch['error'] === 'bad_keys') {
+        return array('error' => 'bad_keys', 'rows' => array(), 'count' => 0, 'physical_count' => 0);
+    }
+    if ($tabFetch['error'] === 'query_failed') {
+        return array('error' => 'query_failed', 'rows' => array(), 'count' => 0, 'physical_count' => 0);
+    }
     $tabKeyed = array();
 
     if ($tabCompareCols === null) {
@@ -402,7 +427,7 @@ function fxStaticSyncDbLastError($objDb) {
 }
 
 /**
- * Exécute une requête et remonte l'erreur MySQL (sans die ni echo legacy).
+ * Exécute une requête d'écriture — erreur remontée dans le message flash (fxQuery n'echo pas).
  */
 function fxStaticSyncExecQuery($objDb, $strSql) {
     if (!$objDb) {
@@ -619,6 +644,8 @@ function fxStaticSyncStatusLabel($strStatus, array $tabCmp = null) {
             return 'Structures non alignées';
         case 'no_connection':
             return 'Connexion impossible';
+        case 'error':
+            return 'Erreur lecture';
     }
 
     if (is_array($tabCmp)) {
@@ -659,6 +686,8 @@ function fxStaticSyncStatusClass($strStatus) {
             return 'ss-muted';
         case 'schema_mismatch':
             return 'ss-schema';
+        case 'error':
+            return 'ss-bad';
         default:
             return 'ss-bad';
     }
@@ -738,6 +767,19 @@ function fxStaticSyncCompareEnvPair($objSource, $objTarget, array $tabDef) {
     $tabSourceData = fxStaticSyncLoadKeyedRows($objSource, $tabDef, $tabSchema['compare_cols']);
     $tabTargetData = fxStaticSyncLoadKeyedRows($objTarget, $tabDef, $tabSchema['compare_cols']);
 
+    if (!empty($tabSourceData['error']) || !empty($tabTargetData['error'])) {
+        return array(
+            'status' => 'error',
+            'source_count' => isset($tabSourceData['count']) ? $tabSourceData['count'] : 0,
+            'target_count' => isset($tabTargetData['count']) ? $tabTargetData['count'] : 0,
+            'missing_keys' => array(),
+            'extra_keys' => array(),
+            'diff_keys' => array(),
+            'schema_missing_cols' => array(),
+            'schema_extra_cols' => array(),
+        );
+    }
+
     return fxStaticSyncCompareTable($tabSourceData, $tabTargetData, $tabSchema);
 }
 
diff --git a/php/inc_fx_static_sync_config.php b/php/inc_fx_static_sync_config.php
index bf2c018..8259b9f 100644
--- a/php/inc_fx_static_sync_config.php
+++ b/php/inc_fx_static_sync_config.php
@@ -77,13 +77,13 @@ function fxStaticSyncTableDefinitions() {
         array(
             'table' => 'modes_remboursements',
             'label' => 'Modes remboursement',
-            'keys' => array('mod_id'),
+            'keys' => array('mr_id'),
             'ignore_cols' => array(),
         ),
         array(
             'table' => 'types_remboursements',
             'label' => 'Types remboursement',
-            'keys' => array('typ_id'),
+            'keys' => array('tr_id'),
             'ignore_cols' => array(),
         ),
         array(