Can t solve the Broken Reference When Inserting New Values

[suomai777iamous]

export function button51_click ( event ) {

 $w ( '#loader' ). show () 
$w ( '#button51' ). disable () 
**let**  page  =  $w ( "#dynamicDataset" ). getCurrentItem (); 
**let**  pageId  =  page._id ; 
wixData . insert ( 'comments' ,{