diff --git a/agreement/models/agreement.py b/agreement/models/agreement.py
index c2ce8bb2a..963398306 100644
--- a/agreement/models/agreement.py
+++ b/agreement/models/agreement.py
@@ -334,16 +334,21 @@ class Agreement(models.Model):
         for record in self:
             record.total_company_mrc = amount_total
 
-    @api.onchange('field_id')
-    def onchange_sub_object_id(self):
-        if self.field_id:
+    @api.onchange('field_id', 'sub_model_object_field_id', 'default_value')
+    def onchange_copyvalue(self):
+        self.sub_object_id = False
+        self.copyvalue = False
+        self.sub_object_id = False
+        if self.field_id and not self.field_id.relation:
+            self.copyvalue = "${object.%s or %s}" % \
+                             (self.field_id.name,
+                              self.default_value or '\'\'')
+            self.sub_model_object_field_id = False
+        if self.field_id and self.field_id.relation:
             self.sub_object_id = self.env['ir.model'].search(
                 [('model', '=', self.field_id.relation)])[0]
-
-    @api.onchange('sub_model_object_field_id', 'default_value')
-    def onchange_copyvalue(self):
-        if self.sub_model_object_field_id or self.default_value:
-            self.copyvalue = "${object.%s.%s or %s}" % \
+        if self.sub_model_object_field_id:
+            self.copyvalue = "${object.%s.%s or %s}" %\
                              (self.field_id.name,
                               self.sub_model_object_field_id.name,
                               self.default_value or '\'\'')
diff --git a/agreement/models/agreement_appendix.py b/agreement/models/agreement_appendix.py
index 8699d5793..d70f2e21b 100644
--- a/agreement/models/agreement_appendix.py
+++ b/agreement/models/agreement_appendix.py
@@ -49,16 +49,21 @@ class AgreementAppendix(models.Model):
         help="""Final placeholder expression, to be copy-pasted in the desired
          template field.""")
 
-    @api.onchange('field_id')
-    def onchange_sub_object_id(self):
-        if self.field_id:
+    @api.onchange('field_id', 'sub_model_object_field_id', 'default_value')
+    def onchange_copyvalue(self):
+        self.sub_object_id = False
+        self.copyvalue = False
+        self.sub_object_id = False
+        if self.field_id and not self.field_id.relation:
+            self.copyvalue = "${object.%s or %s}" % \
+                             (self.field_id.name,
+                              self.default_value or '\'\'')
+            self.sub_model_object_field_id = False
+        if self.field_id and self.field_id.relation:
             self.sub_object_id = self.env['ir.model'].search(
                 [('model', '=', self.field_id.relation)])[0]
-
-    @api.onchange('sub_model_object_field_id', 'default_value')
-    def onchange_copyvalue(self):
-        if self.sub_model_object_field_id or self.default_value:
-            self.copyvalue = "${object.%s.%s or %s}" % \
+        if self.sub_model_object_field_id:
+            self.copyvalue = "${object.%s.%s or %s}" %\
                              (self.field_id.name,
                               self.sub_model_object_field_id.name,
                               self.default_value or '\'\'')
diff --git a/agreement/models/agreement_clause.py b/agreement/models/agreement_clause.py
index 00651f984..182f42279 100644
--- a/agreement/models/agreement_clause.py
+++ b/agreement/models/agreement_clause.py
@@ -58,16 +58,21 @@ class AgreementClause(models.Model):
         help="""Final placeholder expression, to be copy-pasted in the desired
          template field.""")
 
-    @api.onchange('field_id')
-    def onchange_sub_object_id(self):
-        if self.field_id:
+    @api.onchange('field_id', 'sub_model_object_field_id', 'default_value')
+    def onchange_copyvalue(self):
+        self.sub_object_id = False
+        self.copyvalue = False
+        self.sub_object_id = False
+        if self.field_id and not self.field_id.relation:
+            self.copyvalue = "${object.%s or %s}" % \
+                             (self.field_id.name,
+                              self.default_value or '\'\'')
+            self.sub_model_object_field_id = False
+        if self.field_id and self.field_id.relation:
             self.sub_object_id = self.env['ir.model'].search(
                 [('model', '=', self.field_id.relation)])[0]
-
-    @api.onchange('sub_model_object_field_id', 'default_value')
-    def onchange_copyvalue(self):
-        if self.sub_model_object_field_id or self.default_value:
-            self.copyvalue = "${object.%s.%s or %s}" % \
+        if self.sub_model_object_field_id:
+            self.copyvalue = "${object.%s.%s or %s}" %\
                              (self.field_id.name,
                               self.sub_model_object_field_id.name,
                               self.default_value or '\'\'')
diff --git a/agreement/models/agreement_recital.py b/agreement/models/agreement_recital.py
index c466f45d2..47bc28bc8 100644
--- a/agreement/models/agreement_recital.py
+++ b/agreement/models/agreement_recital.py
@@ -50,16 +50,21 @@ class AgreementRecital(models.Model):
         help="""Final placeholder expression, to be copy-pasted in the desired
          template field.""")
 
-    @api.onchange('field_id')
-    def onchange_sub_object_id(self):
-        if self.field_id:
+    @api.onchange('field_id', 'sub_model_object_field_id', 'default_value')
+    def onchange_copyvalue(self):
+        self.sub_object_id = False
+        self.copyvalue = False
+        self.sub_object_id = False
+        if self.field_id and not self.field_id.relation:
+            self.copyvalue = "${object.%s or %s}" % \
+                             (self.field_id.name,
+                              self.default_value or '\'\'')
+            self.sub_model_object_field_id = False
+        if self.field_id and self.field_id.relation:
             self.sub_object_id = self.env['ir.model'].search(
                 [('model', '=', self.field_id.relation)])[0]
-
-    @api.onchange('sub_model_object_field_id', 'default_value')
-    def onchange_copyvalue(self):
-        if self.sub_model_object_field_id or self.default_value:
-            self.copyvalue = "${object.%s.%s or %s}" % \
+        if self.sub_model_object_field_id:
+            self.copyvalue = "${object.%s.%s or %s}" %\
                              (self.field_id.name,
                               self.sub_model_object_field_id.name,
                               self.default_value or '\'\'')
diff --git a/agreement/models/agreement_section.py b/agreement/models/agreement_section.py
index 2ee345c6c..ea80af770 100644
--- a/agreement/models/agreement_section.py
+++ b/agreement/models/agreement_section.py
@@ -49,16 +49,21 @@ class AgreementSection(models.Model):
         help="""Final placeholder expression, to be copy-pasted in the desired
          template field.""")
 
-    @api.onchange('field_id')
-    def onchange_sub_object_id(self):
-        if self.field_id:
+    @api.onchange('field_id', 'sub_model_object_field_id', 'default_value')
+    def onchange_copyvalue(self):
+        self.sub_object_id = False
+        self.copyvalue = False
+        self.sub_object_id = False
+        if self.field_id and not self.field_id.relation:
+            self.copyvalue = "${object.%s or %s}" % \
+                             (self.field_id.name,
+                              self.default_value or '\'\'')
+            self.sub_model_object_field_id = False
+        if self.field_id and self.field_id.relation:
             self.sub_object_id = self.env['ir.model'].search(
                 [('model', '=', self.field_id.relation)])[0]
-
-    @api.onchange('sub_model_object_field_id', 'default_value')
-    def onchange_copyvalue(self):
-        if self.sub_model_object_field_id or self.default_value:
-            self.copyvalue = "${object.%s.%s or %s}" % \
+        if self.sub_model_object_field_id:
+            self.copyvalue = "${object.%s.%s or %s}" %\
                              (self.field_id.name,
                               self.sub_model_object_field_id.name,
                               self.default_value or '\'\'')