I entered a command incorrectly as follows:

```
    DSolve[{y'[x]=y[x]},y[x],x]

```

I am now experiencing:

```
    DSolve[{y'[x] == y[x]}, y[x], x]

```

> 
> During evaluation of In[26]:= DSolve::deqn: Equation or list of equations expected instead of True in the first argument {True}. >>
> 
> 
> 

```
(* DSolve[{True},y(x),x] *)

```

How do I recover from this error. I've tried `Clear[y'[x]]`. That didn't work.