diff --git a/mysql/migration/2.0.0-2.1.0.sql b/mysql/migration/2.0.0-2.1.0.sql
index 4ab08dc7415..0f82ef022f2 100644
--- a/mysql/migration/2.0.0-2.1.0.sql
+++ b/mysql/migration/2.0.0-2.1.0.sql
@@ -316,6 +316,10 @@ alter table llx_propaldet add column rang integer DEFAULT 0;
 
 alter table llx_facture drop column model;
 alter table llx_facture add column model_pdf varchar(50) after note_public;
+alter table llx_facture add column fk_facture integer after fk_user_valid;
+ALTER TABLE llx_facture ADD INDEX idx_facture_fk_facture (fk_facture);
+ALTER TABLE llx_facture ADD CONSTRAINT fk_facture_fk_facture        FOREIGN KEY (fk_facture)     REFERENCES llx_facture (rowid);
+
 
 
 update llx_societe_remise_except set description='Remise sans description' where description is NULL or description ='';
diff --git a/mysql/tables/llx_facture.key.sql b/mysql/tables/llx_facture.key.sql
index 93b8d12ec7f..b99e7996cf4 100644
--- a/mysql/tables/llx_facture.key.sql
+++ b/mysql/tables/llx_facture.key.sql
@@ -25,11 +25,13 @@
 ALTER TABLE llx_facture ADD INDEX idx_facture_fk_soc (fk_soc);
 ALTER TABLE llx_facture ADD INDEX idx_facture_fk_user_author (fk_user_author);
 ALTER TABLE llx_facture ADD INDEX idx_facture_fk_user_valid (fk_user_valid);
+ALTER TABLE llx_facture ADD INDEX idx_facture_fk_facture (fk_facture);
 ALTER TABLE llx_facture ADD INDEX idx_facture_fk_projet (fk_projet);
 
 ALTER TABLE llx_facture ADD CONSTRAINT fk_facture_fk_soc            FOREIGN KEY (fk_soc) REFERENCES llx_societe (idp);
 ALTER TABLE llx_facture ADD CONSTRAINT fk_facture_fk_user_author    FOREIGN KEY (fk_user_author) REFERENCES llx_user (rowid);
-ALTER TABLE llx_facture ADD CONSTRAINT fk_facture_fk_user_valid     FOREIGN KEY (fk_user_valid) REFERENCES llx_user (rowid);
+ALTER TABLE llx_facture ADD CONSTRAINT fk_facture_fk_user_valid     FOREIGN KEY (fk_user_valid)  REFERENCES llx_user (rowid);
+ALTER TABLE llx_facture ADD CONSTRAINT fk_facture_fk_facture        FOREIGN KEY (fk_facture)     REFERENCES llx_facture (rowid);
 ALTER TABLE llx_facture ADD CONSTRAINT fk_facture_fk_projet         FOREIGN KEY (fk_projet) REFERENCES llx_projet (rowid);
 
 ALTER TABLE llx_facture ADD UNIQUE INDEX idx_facture_uk_facnumber (facnumber);
diff --git a/mysql/tables/llx_facture.sql b/mysql/tables/llx_facture.sql
index 30a3a58262a..ffa07ac489f 100644
--- a/mysql/tables/llx_facture.sql
+++ b/mysql/tables/llx_facture.sql
@@ -44,6 +44,7 @@ create table llx_facture
   fk_user_author      integer,   -- createur de la facture
   fk_user_valid       integer,   -- valideur de la facture
 
+  fk_facture          integer,   -- facture origine si facture avoir
   fk_projet           integer,   -- projet auquel est associée la facture
 
   fk_cond_reglement   integer  DEFAULT 1 NOT NULL,  -- condition de reglement (30 jours, fin de mois ...)