diff --git a/backend/recurrent_transfers.sql b/backend/recurrent_transfers.sql
index 2cd27eb7f35d587213fecb03d77a56eb40fae7ab..9c49040ebb93d20e0508ba385ed27d3c965a6293 100644
--- a/backend/recurrent_transfers.sql
+++ b/backend/recurrent_transfers.sql
@@ -97,15 +97,28 @@ $$
 DECLARE 
   _pair_id INT;
   _amount BIGINT := ((_operation_body)->'value'->'amount'->>'amount')::BIGINT;
+  _extension_data JSONB;
+  _first_elem JSONB;
 BEGIN
-  WITH json_data AS (
-    SELECT (_operation_body)->'value'->'extensions' AS extension_data
-  )
-  SELECT (inner_elem->>'pair_id')::INT INTO _pair_id
-  FROM json_data,
-  LATERAL jsonb_array_elements(extension_data) AS outer_elem,
-  LATERAL jsonb_array_elements(outer_elem) AS inner_elem
-  WHERE jsonb_typeof(inner_elem) = 'object' AND inner_elem ? 'pair_id';
+  _extension_data := (_operation_body)->'value'->'extensions';
+  
+  -- Handle both pre-HF28 (nested arrays) and post-HF28 (direct objects) formats
+  IF jsonb_array_length(_extension_data) > 0 THEN
+    _first_elem := _extension_data->0;
+    
+    -- Check if we have the old nested array format or new direct object format
+    IF jsonb_typeof(_first_elem) = 'array' THEN
+      -- Old format: array of arrays
+      SELECT (inner_elem->>'pair_id')::INT INTO _pair_id
+      FROM jsonb_array_elements(_extension_data) AS outer_elem,
+      LATERAL jsonb_array_elements(outer_elem) AS inner_elem
+      WHERE jsonb_typeof(inner_elem) = 'object' AND inner_elem ? 'pair_id'
+      LIMIT 1;
+    ELSIF jsonb_typeof(_first_elem) = 'object' AND _first_elem ? 'pair_id' THEN
+      -- New format: array of objects directly
+      _pair_id := (_first_elem->>'pair_id')::INT;
+    END IF;
+  END IF;
 
   RETURN (
     ((_operation_body)->'value'->>'from')::TEXT,
@@ -146,15 +159,28 @@ AS
 $$
 DECLARE 
   _pair_id INT;
+  _extension_data JSONB;
+  _first_elem JSONB;
 BEGIN
-  WITH json_data AS (
-    SELECT (_operation_body)->'value'->'extensions' AS extension_data
-  )
-  SELECT inner_elem->>'pair_id' INTO _pair_id
-  FROM json_data,
-  LATERAL jsonb_array_elements(extension_data) AS outer_elem,
-  LATERAL jsonb_array_elements(outer_elem) AS inner_elem
-  WHERE jsonb_typeof(inner_elem) = 'object' AND inner_elem ? 'pair_id';
+  _extension_data := (_operation_body)->'value'->'extensions';
+  
+  -- Handle both pre-HF28 (nested arrays) and post-HF28 (direct objects) formats
+  IF jsonb_array_length(_extension_data) > 0 THEN
+    _first_elem := _extension_data->0;
+    
+    -- Check if we have the old nested array format or new direct object format
+    IF jsonb_typeof(_first_elem) = 'array' THEN
+      -- Old format: array of arrays
+      SELECT inner_elem->>'pair_id' INTO _pair_id
+      FROM jsonb_array_elements(_extension_data) AS outer_elem,
+      LATERAL jsonb_array_elements(outer_elem) AS inner_elem
+      WHERE jsonb_typeof(inner_elem) = 'object' AND inner_elem ? 'pair_id'
+      LIMIT 1;
+    ELSIF jsonb_typeof(_first_elem) = 'object' AND _first_elem ? 'pair_id' THEN
+      -- New format: array of objects directly
+      _pair_id := (_first_elem->>'pair_id')::INT;
+    END IF;
+  END IF;
 
   RETURN (
     ((_operation_body)->'value'->>'from')::TEXT,
@@ -217,15 +243,28 @@ $$
 DECLARE 
   _pair_id INT;
   _delete BOOLEAN;
+  _extension_data JSONB;
+  _first_elem JSONB;
 BEGIN
-  WITH json_data AS (
-    SELECT (_operation_body)->'value'->'extensions' AS extension_data
-  )
-  SELECT inner_elem->>'pair_id' INTO _pair_id
-  FROM json_data,
-  LATERAL jsonb_array_elements(extension_data) AS outer_elem,
-  LATERAL jsonb_array_elements(outer_elem) AS inner_elem
-  WHERE jsonb_typeof(inner_elem) = 'object' AND inner_elem ? 'pair_id';
+  _extension_data := (_operation_body)->'value'->'extensions';
+  
+  -- Handle both pre-HF28 (nested arrays) and post-HF28 (direct objects) formats
+  IF jsonb_array_length(_extension_data) > 0 THEN
+    _first_elem := _extension_data->0;
+    
+    -- Check if we have the old nested array format or new direct object format
+    IF jsonb_typeof(_first_elem) = 'array' THEN
+      -- Old format: array of arrays
+      SELECT inner_elem->>'pair_id' INTO _pair_id
+      FROM jsonb_array_elements(_extension_data) AS outer_elem,
+      LATERAL jsonb_array_elements(outer_elem) AS inner_elem
+      WHERE jsonb_typeof(inner_elem) = 'object' AND inner_elem ? 'pair_id'
+      LIMIT 1;
+    ELSIF jsonb_typeof(_first_elem) = 'object' AND _first_elem ? 'pair_id' THEN
+      -- New format: array of objects directly
+      _pair_id := (_first_elem->>'pair_id')::INT;
+    END IF;
+  END IF;
 
   -- FIX for a bug in failed_recurrent_transfer_operation - delete is not set when remaining_executions = 0
   _delete := (