Delete ionic

image

can i know how to solve this

Local
context
:
undefined
error
:
Error: Uncaught (in promise): TypeError: Cannot read property ‘_id’ of undefined TypeError: Cannot read property ‘_id’ of undefined at http://localhost:8100/build/main.js:186:58 at t.invoke (http://localhost:8100/build/polyfills.js:3:9094) at Object.onInvoke (http://localhost:8100/build/vendor.js:32175:37) at t.invoke (http://localhost:8100/build/polyfills.js:3:9045) at e.run (http://localhost:8100/build/polyfills.js:3:6481) at http://localhost:8100/build/polyfills.js:3:4583 at t.invokeTask (http://localhost:8100/build/polyfills.js:3:9723) at Object.onInvokeTask (http://localhost:8100/build/vendor.js:32166:37) at t.invokeTask (http://localhost:8100/build/polyfills.js:3:9659) at e.runTask (http://localhost:8100/build/polyfills.js:3:7083) at http://localhost:8100/build/main.js:186:58 at t.invoke (http://localhost:8100/build/polyfills.js:3:9094) at Object.onInvoke (http://localhost:8100/build/vendor.js:32175:37) at t.invoke (http://localhost:8100/build/polyfills.js:3:9045) at e.run (http://localhost:8100/build/polyfills.js:3:6481) at http://localhost:8100/build/polyfills.js:3:4583 at t.invokeTask (http://localhost:8100/build/polyfills.js:3:9723) at Object.onInvokeTask (http://localhost:8100/build/vendor.js:32166:37) at t.invokeTask (http://localhost:8100/build/polyfills.js:3:9659) at e.runTask (http://localhost:8100/build/polyfills.js:3:7083) at s (http://localhost:8100/build/polyfills.js:3:4211) at http://localhost:8100/build/polyfills.js:3:4612 at t.invokeTask (http://localhost:8100/build/polyfills.js:3:9723) at Object.onInvokeTask (http://localhost:8100/build/vendor.js:32166:37) at t.invokeTask (http://localhost:8100/build/polyfills.js:3:9659) at e.runTask (http://localhost:8100/build/polyfills.js:3:7083) at i (http://localhost:8100/build/polyfills.js:3:3671) at HTMLButtonElement.invoke (http://localhost:8100/build/polyfills.js:3:10876)
originalError
:
undefined
originalStack
:
undefined
this
:
IonicErrorHandler
Closure
Window
Global