Notice: Undefined index: path in ApacheSolrDocument->__get() (line 305 of sites/all/modules/apachesolr/Apache_Solr_Document.php).

After upgrade to apachesolr 1.8 and apachesolr_multilingual to 1.3 I start getting this notice in watchdog during re-index.

Notice: Undefined index: path in ApacheSolrDocument->__get() (line 305 of /sites/all/modules/apachesolr/Apache_Solr_Document.php).

After revert apachesolr_multilingual to 1.3 to 1.2, notice gone.

This is var_dump() of problematic document obj

ApacheSolrDocument Object
(
    [_documentBoost:protected] => 
    [_fields:protected] => Array
        (
            [ss_language] => en
            [label] => Podcast- Episode 1: Introduction to  Mission and Founder
            [content] =>  Blog Team's blog
            [ss_name] => Blog Team
            [tos_name] => Blog Team
            [ss_name_formatted] => Blog Team
            [tos_name_formatted] => Blog Team
            [is_uid] => 210925
            [bs_status] => 1
            [bs_sticky] => 0
            [bs_promote] => 0
            [is_tnid] => 3310
            [bs_translate] => 0
            [ds_created] => 2015-07-29T18:01:53Z
            [ds_changed] => 2015-11-17T20:32:47Z
            [ds_last_comment_or_change] => 2015-11-17T20:32:47Z
            [tags_a] =>  Blog Team's blog   Listen Now      iTunes Stitcher Soundcloud
        )

    [_fieldBoosts:protected] => Array
        (
            [ss_language] => 
            [label] => 
            [content] => 
            [teaser] => 
            [ss_name] => 
            [tos_name] => 
            [ss_name_formatted] => 
            [tos_name_formatted] => 
            [is_uid] => 
            [bs_status] => 
            [bs_sticky] => 
            [bs_promote] => 
            [is_tnid] => 
            [bs_translate] => 
            [ds_created] => 
            [ds_changed] => 
            [ds_last_comment_or_change] => 
            [tags_a] => 
        )

)