Add an element between another two existents

Hi.
I need to add an element (optional, of course) to my schema (that have a lot of XMLs) between another two elements in a sequence.
When I try to update the schema I obtain this:

<ino:response xmlns:ino="http://namespaces.softwareag.com/tamino/response2" xmlns:xql="http://metalab.unc.edu/xql/">
           <ino:message ino:returnvalue="7946">
             <ino:messagetext ino:code="INOXDE7946">Mismatch of element or attribute name detected during schema update</ino:messagetext>
             <ino:messageline>Line 147, Column 3: old schema:  tsd:doctype : DDJJ-ARIB, &#10; xs:element : DDJJ-ARIB, &#10; xs:element : DDJJ-ARIB, &#10; xs:complexType, &#10; xs equence, &#10; xs:element : DATOS-WEB, &#10; xs:element : DATOS-WEB, &#10; xs:complexType, &#10; xs equence, &#10; xs:element : C-TIPO-CONTRI, &#10; xs:element : C-TIPO-CONTRI , new schema:  tsd:doctype : DDJJ-ARIB, &#10; xs:element : DDJJ-ARIB, &#10; xs:element : DDJJ-ARIB, &#10; xs:complexType, &#10; xs equence, &#10; xs:element : DATOS-WEB, &#10; xs:element : DATOS-WEB, &#10; xs:complexType, &#10; xs equence, &#10; xs:element : N-DEDUC, &#10; xs:element : N-DEDUC</ino:messageline>
           </ino:message>
         </ino:response>

… where N-DEDUC is my new element that has to be placed before C-TIPO-CONTRI.
It is posible to upgrade the schema or I’ve to delete it and replace it (not an option…)?

Hi Mart