I had a similar problem and realised that there are two ways to change the stadium picture:
1- By club ID
600 is the Bournemouth club ID
<record from="bournemouth" to="graphics/pictures/club/600/stadium"/>
2- By stadium ID (in this case Bournemouth just had a new stadium built in 2029)
<record from="bournemouth2029" to="graphics/pictures/stadium/20000314953/stadium"/>
20000314953 is the new stadium ID
Hope that helps anyone having the same issue in the future!