npm install ngx-bootstrap@5.5.0 --save why this is working but when i am using npm install ngx-bootstrap --save it not working

Question

ERROR in ./node_modules/ngx-editor/fesm5/ngx-editor.js Module not found: Error: Can\'t resolve \'ngx-bootstrap\' in \'P:\\arcon_pam\\pamui\\adminui\\node_modules\\ngx-editor