diff --git a/upload.cfm b/upload.cfm
index 9730cef..7a5a93e 100644
--- a/upload.cfm
+++ b/upload.cfm
@@ -143,6 +143,18 @@
         </cfif>
         <cfset contractId = structKeyExists(form, "contract_id") ? form.contract_id : "">
         <cftransaction>
+            <cfif len(contractId)>
+                <cfquery name="oldD" datasource="baza">
+                    SELECT s.id as sid, s.document_id FROM supplements s
+                    JOIN documents d ON d.id = s.document_id
+                    WHERE s.contract_id = <cfqueryparam value="#contractId#" cfsqltype="cf_sql_varchar">
+                    AND d.filename = <cfqueryparam value="#upload.clientFile#" cfsqltype="cf_sql_varchar">
+                </cfquery>
+                <cfif oldD.recordCount GT 0>
+                    <cfquery datasource="baza">DELETE FROM supplements WHERE id = <cfqueryparam value="#oldD.sid#" cfsqltype="cf_sql_varchar"></cfquery>
+                    <cfquery datasource="baza">DELETE FROM documents WHERE id = <cfqueryparam value="#oldD.document_id#" cfsqltype="cf_sql_varchar"></cfquery>
+                </cfif>
+            </cfif>
             <cfquery datasource="baza">
                 INSERT INTO documents (filename, mime_type, original_bytes, status) VALUES (<cfqueryparam value="#upload.clientFile#" cfsqltype="cf_sql_varchar">,<cfqueryparam value="#mime#" cfsqltype="cf_sql_varchar">,<cfqueryparam value="#toBase64(fileBytes)#" cfsqltype="cf_sql_varchar">,'uploaded')
             </cfquery>