My users are unable to edit any record. They are getting error:
Error:Apex trigger trgLead caused an unexpected exception, contact your administrator: trgLead: execution of BeforeUpdate caused by: System.QueryException: Non-selective query against large object type (more than 100000 rows). Consider an indexed filter or contact salesforce.com about custom indexing. Even if a field is indexed a filter might still not be selective when: 1. The filter value includes null (for instance binding with a list that contains null) 2. Data skew exists whereby the number of matching rows is very large (for instance, filtering for a particular foreign key value that occurs many times): Trigger.trgLead: line 25, column 1
