Problem when indexing with Solr

I'm getting this error when indexing some nodes with solr and I think that it's something related to this module because I don't get this error when I disable Node Displays and also it says somethin about this module in the error message:

	Indexing failed on one of the following nodes: 31847
"500" Status: Internal Server Error


Error 500

HTTP ERROR: 500Error while creating field 'ds_cck_field_vigencia_desde{type=date,properties=indexed,stored,omitNorms,omitTermFreqAndPositions,sortMissingLast}' from value '2010-01-26T00:00:00'

org.apache.solr.common.SolrException: Error while creating field 'ds_cck_field_vigencia_desde{type=date,properties=indexed,stored,omitNorms,omitTermFreqAndPositions,sortMissingLast}' from value '2010-01-26T00:00:00'
at org.apache.solr.schema.FieldType.createField(FieldType.java:200)
at org.apache.solr.schema.SchemaField.createField(SchemaField.java:94)
at org.apache.solr.update.DocumentBuilder.toDocument(DocumentBuilder.java:246)
at org.apache.solr.update.processor.RunUpdateProcessor.processAdd(RunUpdateProcessorFactory.java:60)
at org.apache.solr.handler.XMLLoader.processUpdate(XMLLoader.java:139)
at org.apache.solr.handler.XMLLoader.load(XMLLoader.java:69)
at org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:54)
at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:131)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:1316)
at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:338)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:241)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1089)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:211)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:285)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:835)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:641)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:208)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:378)
at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:226)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
Caused by: org.apache.solr.common.SolrException: Invalid Date String:'2010-01-26T00:00:00'
at org.apache.solr.schema.DateField.parseMath(DateField.java:163)
at org.apache.solr.schema.DateField.toInternal(DateField.java:133)
at org.apache.solr.schema.FieldType.createField(FieldType.java:198)
...27 more

RequestURI=/solr/updatePowered by Jetty://

It seems to be something related to a Date field that I have in a content type which is stored as varchar in the database. It seems that ND is trying to create this field: ds_cck_field_vigencia_desde?
Any help is welcome!