MySQL attribute_value column, cwd_directory_attribute table can only accept 255 characters

Request processing failed; nested exception is com.atlassian.crowd.embedded.ofbiz.db.DataAccessException: org.ofbiz.core.entity.GenericEntityException: while inserting: [GenericEntity:DirectoryAttribute][directoryId,10001][name,ldap.user.dn][value,((objectClass=user)(|(memberOf=cn=departmentdevfte,ou=enterprise distribution groups,ou=msg,OU=ENT,DC=ent,DC=abc,DC=co,DC=corp)(memberOf=cn=devcontractors,ou=enterprise distribution groups,ou=msg,OU=ENT,DC=ent,DC=abc,DC=co,DC=corp)(memberOf=CN=devtools,OU=Enterprise Distribution Groups,OU=MSG,OU=ENT,DC=ent,DC=abc,DC=co,DC=corp)))] (SQL Exception while executing the following:INSERT INTO cwd_directory_attribute (directory_id, attribute_name, attribute_value) VALUES (?, ?, ?) (Data truncation: Data too long for column 'attribute_value' at row 1))

alter table cwd_directory_attribute modify attribute_value VARCHAR(400) ;