Index: ssts-web/src/main/webapp/dataUpdater/sqls/4.9.29_4.9.30_sqlserver.sql
===================================================================
diff -u -r25661 -r25680
--- ssts-web/src/main/webapp/dataUpdater/sqls/4.9.29_4.9.30_sqlserver.sql	(.../4.9.29_4.9.30_sqlserver.sql)	(revision 25661)
+++ ssts-web/src/main/webapp/dataUpdater/sqls/4.9.29_4.9.30_sqlserver.sql	(.../4.9.29_4.9.30_sqlserver.sql)	(revision 25680)
@@ -1 +1,2 @@
+update TousseInstance set weight=null where weight='';
 alter table TousseInstance alter column [weight] float;
\ No newline at end of file
Index: ssts-web/src/main/webapp/dataUpdater/sqls/4.9.29_4.9.30_oracle.sql
===================================================================
diff -u -r25661 -r25680
--- ssts-web/src/main/webapp/dataUpdater/sqls/4.9.29_4.9.30_oracle.sql	(.../4.9.29_4.9.30_oracle.sql)	(revision 25661)
+++ ssts-web/src/main/webapp/dataUpdater/sqls/4.9.29_4.9.30_oracle.sql	(.../4.9.29_4.9.30_oracle.sql)	(revision 25680)
@@ -1,3 +1,4 @@
+execute immediate 'update TousseInstance set weight='' where regexp_like(weight, '( )+')';
 execute immediate 'alter table TousseInstance add weighttemp FLOAT';
 execute immediate 'update TousseInstance set weighttemp = to_number(weight)';
 execute immediate 'commit';